Abstract:
A device for providing keyword advertising capable of efficiently setting advertising costs, when providing keyword advertising via a network; a method for providing such keyword advertising; and a recording medium on which is recorded a program for executing same are provided. Billing is executed based on a final-bid price by one or more advertiser requesting to bid for specific keyword advertising but also by: confirming the bid time of each advertiser and setting a final-bid raking based on the bid amount; setting a final-bid ranking, that is based on the bid time, for advertisers who submitted the same bid amount; and setting, as the final-bid price of each advertiser, a monetary amount with a high pre-set amount vis-à-vis bids of advertisers entering final-bid in lower ranking based on the set final-bid ranking.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
       [0001]    This application claims priority to and the benefit of Korean Patent Application No. 10-2011-0103520 filed in the Korean Intellectual Property Office on Oct. 11, 2011, the entire contents of which are incorporated herein by reference. 
     
    
     STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT 
       [0002]    Not applicable 
       THE NAMES OF THE PARTIES TO A JOINT RESEARCH AGREEMENT 
       [0003]    Not applicable 
       INCORPORATION-BY-REFERENCE OF MATERIAL SUBMITTED ON A COMPACT DISC OR AS A TEXT FILE VIA THE OFFICE ELECTRONIC FILING SYSTEM 
       [0004]    Not applicable 
       STATEMENT REGARDING PRIOR DISCLOSURES BY THE INVENTOR OR A JOINT INVENTION 
       [0005]    Not applicable 
       BACKGROUND OF THE INVENTION 
       [0006]    1. Field of the Invention 
         [0007]    The present invention relates to keyword advertising based on a network, and more particularly, to a device for providing keyword advertising, a method for providing the keyword advertising, and a recording medium for recording a program for executing the same, which can efficiently calculate advertising cost when advertising is displayed based on a keyword input by a user. 
         [0008]    2. Description of Related Art including information disclosed under 37 CFR 1.97 and 1.98. 
         [0009]    Keyword advertising refers to any advertising that is linked to a keyword input by a user when the user searches for a variety of information, such as news, knowledge, and products, on the Internet. In this case, the keyword-linked advertising is performed by setting a separate advertising region in a specific region of a page for providing a search result and providing advertising information of an advertiser to the advertising region. 
         [0010]    This keyword advertising does not indiscriminately provide advertising to a number of unspecified persons, but provides the advertising only to a user who has requested a search using a keyword linked to the advertising. Accordingly, the keyword advertising has advantages in that only potential customers relatively highly likely to use a product or service provided by the advertiser may be targeted, and thus the keyword advertising has been receiving significant attention and is increasingly widely used. 
         [0011]    In keyword advertising, the sale of keywords is achieved through an auction with bids. However, there is intense competition with respect to specific keywords having a large number of searches and thus advertising costs for the keywords are too high. 
         [0012]    For example, a cost-per-click (CPC) method in which an advertising cost is calculated according to the number of times a user selects and clicks the advertising information (for example, a link of a web page of an advertiser, etc.) includes proposing a final-bid price for an advertising cost that should be paid for each click of the advertising information exposed from a number of advertisers through specific keyword searching, exposing the advertising information to a user depending on a position for advertising exposure, a degree of advertising exposure, etc. on the basis of the final-bid price, and calculating the advertising cost based on the proposed one-click advertising cost. 
         [0013]    However, in this case, if the keyword has popularity, the final-bid price for the one-click advertising cost will increase, and the advertising cost may be abnormally highly calculated in comparison to the advertising effect. This may result in reduction in reliability of the advertising and shrinkage of the keyword search market. Thus a solution for using keyword advertising at a reasonable advertising cost that can satisfy both an advertiser and a service provider who provides the keyword advertising has been required. 
       BRIEF SUMMARY OF THE INVENTION 
       [0014]    The present invention is directed to providing a device for providing keyword advertising, a method for providing the keyword advertising, and a recording medium for recording a program for executing the same, which can enhance service satisfaction for the advertiser by efficiently calculating the advertising cost when the keyword advertising is provided through bids, in order to solve a problem of an abnormal advertising cost in related art keyword advertising. 
         [0015]    One aspect of the present invention provides a keyword advertising providing device including: a communication unit configured to transmit and receive data over a network; an advertising processing unit configured to receive a request for a bid on specific keyword advertising, check a bid price and a bid time of each advertiser, set a final-bid ranking according to the bid price and the bid time of the advertiser, and set, as a final-bid price, a price obtained by adding a preset price to a bid price proposed by an advertiser ranked directly below each advertiser based on the final-bid ranking of the advertiser; a keyword search unit configured to receive a keyword search request from each of one or more user terminals and transmit, to the user terminal, advertising information of one or more advertisers selected according to a search result corresponding to the keyword search request and the final-bid ranking of the keyword advertising; a charging processing unit configured to calculate an advertising cost for the advertising information based on the final-bid price set for each advertiser to provide the calculated advertising cost to the advertiser terminal; and a storage unit configured to store one or more of keyword advertising bid information including the bid price and the bid time of each of the one or more advertisers, keyword advertising final-bid information including the final-bid ranking and the final-bid price of the advertiser, advertising information of each of the one or more advertisers, and advertising output information corresponding to the advertising information. 
         [0016]    The advertising processing unit may include: a bid processing module configured to receive the bid price of each of the one or more advertisers who have requested bids on specific keyword advertising from the advertiser terminal, check the bid time of each advertiser, the bid time being a time when the bid price is received, and register the bid price and the bid time; and a final-bid setting module configured to set the final-bid ranking of each of the one or more advertisers according to the bid price and the bid time registered by the bid processing module and set, as a final-bid price of each advertiser, a price obtained by adding the preset price to the price obtained by adding a preset price to a bid price proposed by an advertiser ranked directly below each advertiser based on the final-bid ranking of the advertiser. 
         [0017]    When the advertiser places a rebid at the same price, the bid processing module may update the bid time to a rebid time. 
         [0018]    The final-bid setting module may group advertisers who have proposed the same bid price into one bid group to set the same final-bid price to the advertisers grouped into one bid group. 
         [0019]    The final-bid setting module may set the final-bid ranking to each of the advertisers grouped in one bid group in order of earlier bid time. 
         [0020]    When only one advertiser has requested a bid on the specific keyword advertising, the final-bid setting module may set a preset lowest bid price as the final-bid price. 
         [0021]    Another aspect of the present invention provides a keyword advertising providing method using a keyword advertising providing device for communicating between one or more advertiser terminals and one or more user terminals over a network, the keyword advertising providing method including: receiving a request, by each of one or more advertisers, for a bid on specific keyword advertising from each of the one or more advertiser terminals; receiving a bid price on the keyword advertising from the each of the one or more advertiser terminals; checking a bid time when the bid price is received, setting a final-bid ranking for each advertiser in order of higher bid price and earlier bid time; setting, as a final-bid price of each advertiser, a price obtained by adding a preset price to a bid price proposed by an advertiser ranked directly below each advertiser based on the final-bid ranking of the advertiser; transmitting advertising information of each advertiser to each user terminal according to the final-bid ranking; and calculating an advertising cost of each advertiser for the advertiser information based on the final-bid price. 
         [0022]    The setting of the final-bid ranking may include grouping advertisers who have proposed the same bid price into one bid group to set the same final-bid price to the advertisers grouped into one bid group. 
         [0023]    When only one advertiser has requested a bid on the specific keyword advertising, the setting of the final-bid price may include setting a preset lowest bid price as the final-bid price. 
         [0024]    Still another aspect of the present invention provides a computer readable recording medium having a program recorded therein, the program causing a computer to execute: receiving a bid price on keyword advertising from each of one or more advertisers who have requested bids on a specific keyword; extracting a bid time when the bid price is received from the advertiser; setting a final-bid ranking for each advertiser in order of higher bid price and earlier bid time; setting, as a final-bid price of each advertiser, a price obtained by adding a preset price to a bid price proposed by an advertiser ranked directly below each advertiser based on the final-bid ranking of the advertiser; selecting advertising information of the advertiser according to the final-bid ranking to output the selected advertising information together with a search result; and calculating an advertising cost of each advertiser as the advertising information is output. 
         [0025]    According to the present invention, in the case of providing keyword advertising, when a bid is placed on individual keyword advertising, it is possible to further check a bid time in addition to a bid price of an advertiser, set a final-bid ranking in the order of higher bid price, set the final-bid ranking in the order of earlier bid time when advertisers have proposed the same bid price, set, as a final-bid price, a price obtained by adding a preset price to a bid price proposed by an advertiser ranked directly below each advertiser based on the final-bid ranking of the advertiser, and set the same final-bid price to advertisers who have proposed the same bid price, thereby maintaining a proper level of advertising cost and thus satisfying both the advertiser and the service provider providing keyword advertising even when there is excessive competition between the advertisers. 
     
    
     
       BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS 
         [0026]      FIG. 1  is a block diagram illustrating an entire configuration of a system for providing keyword advertising according to the present invention. 
           [0027]      FIG. 2  is a block diagram illustrating a configuration of a keyword advertising providing device according to the present invention. 
           [0028]      FIG. 3  is a flowchart showing a keyword advertising providing method according to the present invention. 
           [0029]      FIG. 4  is a table illustrating an example of setting a final-bid ranking using the keyword advertising providing method according to the present invention. 
           [0030]      FIGS. 5 and 6  are tables illustrating an example of setting a final-bid price using the keyword advertising providing method according to the present invention. 
       
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       [0031]    Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, detailed descriptions related to well-known functions or configurations will be omitted in order not to unnecessarily obscure subject matters of the present invention. In addition, it should be noted that like reference numerals denotes like elements throughout the specification and drawings. 
         [0032]    The terms or words used in the specification and claims should not be construed as being limited to typical or dictionary meanings, but construed with meanings and concepts corresponding to the technical idea of the present invention on the basis of the principle that an inventor can appropriately define the concept of the term for describing his or her invention in the best method. 
         [0033]      FIG. 1  is a block diagram illustrating an entire configuration of a system for providing keyword advertising according to the present invention. 
         [0034]    Referring to  FIG. 1 , the keyword advertising according to the present invention is provided by a keyword advertising providing device  100 , a plurality of advertiser terminals  200 , and a plurality of user terminals  300 , which are connected over a network  10 . 
         [0035]    Here, the network  10  is a wired/wireless network accessible by a plurality of advertiser terminals  200  and a plurality of user terminals  300 , which for example includes a next generation communication network to be developed in the future in addition to a variety of communication networks such as an internet protocol (IP) network for providing large-scale data transmission and reception service and seamless data service through an Internet protocol, an IP network integrated with another network (All IP), a wireless broadband (Wibro) network, a wireless local area network (LAN) including a Wi-Fi network, a wired communication network, a mobile communication network, a High Speed Downlink Packet Access (HSDPA) network, and a satellite communication network. 
         [0036]    The keyword advertising providing device  100  is a device configured to, when a user requests a specific keyword search, provide advertising of one or more advertisers who request advertising through the keyword to the user who has requested the specific keyword search. The keyword advertising providing device  100  may be linked with a variety service, such as a portal site that provides a search service, an electric commerce site that sells one or more products or services or provides a transaction space, etc., and configured to provide advertising associated with the keyword based on the input keyword when a user searches for products or information through the linked service. 
         [0037]    In particular, in order to charge an advertising cost to an advertiser who has requested the keyword advertising, the keyword advertising providing device  100  according to the present invention is configured to receive a bid price from an advertiser, check a bid time of the advertiser, set a final-bid ranking of the advertiser based on the bid price and the bid time, and set, as a final-bid price, a price obtained by adding a preset price to a bid price proposed by an advertiser ranked directly below the advertiser based on the final-bid ranking. In this case, advertisers who have proposed the same bid price may be grouped into one bid group and set to have the same final-bid price. Then advertising information of each advertiser is provided to a user who has input the keyword on the basis of the final-bid ranking and the final-bid price. Subsequently, the advertising costs are calculated based on the final-bid prices according to responses of users, and the calculated advertising costs are charged to the advertisers. 
         [0038]    According to this, even if the final-bid price is increased due to excessive competition between the advertisers, a proper level of advertising cost may be set, thereby satisfying both the advertisers and the service provider who provides the keyword advertising. 
         [0039]      FIG. 2  is a block diagram illustrating a configuration of a keyword advertising providing device according to the present invention. 
         [0040]    Referring to  FIG. 2 , the keyword advertising providing device according to the present invention may be configured to include a communication unit  110 , an advertising processing unit  120 , a keyword searching unit  130 , a storage unit  140 , and a charging processing unit  150 . 
         [0041]    The communication unit  110  transmits and receives data to and from a plurality of advertiser terminals  200  and a plurality of user terminals  300  over the network  10 . In this case, the transmitted and received data may include a keyword advertising bidding request, a bid result, a user&#39;s search keyword, a keyword searching result and advertising information, and advertising cost charging information calculated according to advertising provision. The information transmitted to the plurality of advertiser terminals  200  and the plurality of user terminals  300  through the communication unit  110  may be provided using the World Wide Web. 
         [0042]    The advertising processing unit  120  is configured to receive a bid for keyword advertising and provide the keyword advertising, and specifically, to receive and check a bid price for specific keyword advertising from each of one or more advertiser terminals of advertisers who have requested the keyword advertising and further check a bid time of the advertiser. Here the bid time may be set based on a time at which the bid price of the advertiser is received or input from the advertiser terminal  200 . 
         [0043]    Additionally, the advertising processing unit  120  sets a final-bid ranking of each of the one or more advertisers according to the checked bid prices and bid times and sets, as a final-bid price for the advertising cost of each of the one or more advertisers, a price obtained by adding a preset price to a bid price proposed by an advertiser ranked directly below each advertiser on the basis of the final-bid ranking of the advertiser. 
         [0044]    When a keyword search is requested by a plurality of user terminals  300 , the keyword search unit  130  extracts advertising information of the advertisers on the basis of the final-bid rankings of the plurality of advertisers, which are set for the requested keyword, and transmits the extracted advertising information together with a result of the keyword search to the user terminals  300 . 
         [0045]    In addition, in order to process the above-described functionality, the advertising processing unit  120  may include a bid processing module  121  and a final-bid setting module  122 . The bid processing module  121  and the final-bid setting module  122  may be implemented in software or a combination of software and hardware and configured to perform processing during the bid. 
         [0046]    Specifically, the bid processing module  121  receives a bid price of each of one or more advertisers who have requested bids for the specific keyword advertising and then checks and registers the bid time of the advertiser. In this case, the same advertiser may try to place a rebid on the same keyword advertising. If the bid price is changed, the bid information of the advertiser is updated to include the changed bid price and the bid time when the bid price is changed. Furthermore, if the advertiser places a rebid on the same keyword advertising at the same price, the present invention updates the bid time of the advertiser to the rebid time. That is, the bid time is determined based on the last bid when the same bid is iteratively placed, thereby preventing the advertiser from placing excessive bids. 
         [0047]    The final-bid setting module  122  sets a final-bid ranking of each of the one or more advertisers according to the bid price and the bid time registered by the bid processing module  121  and sets, as a final-bid price of each of the one or more advertisers, a price obtained by adding a preset price to a bid price proposed by an advertiser ranked directly below each advertiser on the basis of the final-bid ranking of the advertiser. In this case, the final-bid ranking is determined based on the bid price preferentially, and determined based on the bid time if the advertisers have proposed the same bid price. 
         [0048]    In addition, when the final-bid rankings and the final-bid prices are set for the plurality of advertisers who have placed bids on the same keyword, the final-bid setting module  122  is configured to group advertisers who have proposed the same bid price into one bid group and set the same final-bid price to the advertisers grouped into the one bid group. 
         [0049]    However, only one advertiser may place a bid on some keywords. When one advertiser has placed a bid on specific keyword advertising, a preset lowest bid price is set as the final-bid price. That is, irrespective of the bid price of the advertiser, the lowest bid price is set as the final-bid price, thereby providing a reasonable advertising cost to the advertiser. 
         [0050]    In addition, while the advertising information of the advertiser, which is associated with the keyword input to the user terminal  300  that has requested the keyword advertising through the keyword search unit  130 , is transmitted, the charging processing unit  150  performs a charging process by calculating advertising costs for one or more advertisers on the basis of the final-bid price set for each advertiser through the final-bid setting module  122  of the advertising processing unit  120 . For example, when the charging is performed in a cost-per-click (CPC) method, and each of the bid price and the final-bid price is an advertising cost for each click, the charging processing unit  150  checks the number of clicks of users on the advertising information of each advertiser, calculates a total advertising cost by multiplying the checked number of clicks by the final-bid price set for the advertiser, and transmits the calculated advertising cost to the advertiser terminal  200  of the advertiser. 
         [0051]    In addition, the charging processing unit  150  may perform payment processing on the calculated advertising cost in cooperation with the commercial terminal  200 . 
         [0052]    Finally, the storage unit  140  is a storage device for storing data needed for operations, such as service provision, of the keyword advertising providing device  100  and specifically includes at least one of keyword advertising bid information  141  including bid prices and bid times of one or more advertisers for individual keyword advertising processed by the advertising processing unit  120 , keyword advertising final-bid information  142  including final-bid rankings and final-bid prices of the one or more advertisers who have placed a bid on keyword advertising set by the advertising processing unit  120 , advertising information  143  intended to be advertised by the one or more advertisers to a user, and advertising output information  144  transmitted to the user terminal  300  through the keyword search unit  130  and output to the user. 
         [0053]    Subsequently, a keyword advertising providing method according to the present invention, which is performed by the keyword advertising providing device  100  configured as described above will be described in sequence with reference to  FIG. 3 . 
         [0054]      FIG. 3  is a flowchart showing a keyword advertising providing method according to the present invention. 
         [0055]    Referring to  FIG. 3 , in operation S 110 , the advertising processing unit  120  of the keyword advertising providing device  100  receives a request for a bid on specific keyword advertising from one or more terminals  200  through the communication unit  110 . This may be achieved by the keyword advertising providing device  100  providing a web page for the keyword advertising and receiving selection of the request for the bid of the keyword advertising from the advertiser terminal  200  through the page. 
         [0056]    Next, in operation S 120 , the advertising processing unit  120  receives bid prices for the keyword advertising from the one or more advertiser terminals  200  of the advertisers. This may be achieved by receiving a bid price from an advertiser terminal  200  which has requested a bid on specific keyword advertising or simultaneously receiving a bid price and a request for a bid on specific keyword advertising. 
         [0057]    In operation S 130 , the advertising processing unit  120  further checks bid times of the advertisers. Each bid time is set as a time when the advertising processing unit  120  receives the bid time from the advertiser terminal  200 . In operation S 140 , the advertising processing unit  120  sets final-bid rankings of the advertisers on the basis of the bid prices and the bid times of the advertisers, which are checked as described above in operation S 140 . Specifically, the advertising processing unit  120  sets the final-bid rankings of the advertisers in descending order of bid price and if there are two or more advertisers who have proposed the same bid price, compare bid times between the advertisers to give a higher final-bid ranking to an advertiser having an earlier bid time. 
         [0058]      FIG. 4  illustrates an example of setting a final-bid ranking using the keyword advertising providing method according to the present invention. Referring to  FIG. 4 , the advertisers A to H have proposed the same bid price of 50 won, the bid time of advertiser A is earliest, and the remaining bid times are, in order, B, C, D, E, F, G, and H. In this case, all the final-bid rankings may be set to be the same. However, according to the present invention, since the final-bid rankings are given according to the bid time when the bid price is the same, the final-bid ranking of advertiser A is highest and the final-bid ranking is higher in the order of B, C, D, E, F, G, and H. In operation S 150 , the advertising processing unit  120  sets, as a final-bid price for the advertising cost of each of the one or more advertisers, a price obtained by adding a preset price to a bid price proposed by an advertiser ranked directly below each advertiser on the basis of the final-bid ranking of the advertiser, which is set as described above. For example, a bid price for an advertiser having the lowest ranking is set as the final-bid price thereof, and the prices obtained by adding a preset price to a bid price of an advertiser ranked directly below each of the other advertisers are set as the final-bid prices thereof. In this case, the advertising processing unit  120  may further group advertisers who have proposed the same bid price into one bid group and set the same final-bid price to the advertisers grouped into one bid group when the final-bid price is set. That is, advertisers who have proposed the same bid price may be given the same final-bid price. In addition, when only one advertiser has requested a bid on specific keyword advertising, that is, when only one bid is placed, the advertising processing unit  120  may set a preset lowest bid price of the advertiser as the final-bid price thereof. That is, when only one bid is placed on specific keyword advertising, a preset lowest bid price is set as the final-bid price, thereby reasonably calculating an advertising cost and thus enhancing reliability of advertisers. 
         [0059]      FIGS. 5 and 6  illustrate an example of setting a final-bid price using the keyword advertising providing method according to the present invention.  FIG. 5  illustrates bid prices of first to fifth final-bid rankings with respect to keywords ‘freckle,’ ‘100 th  day gift,’ ‘double desk,’ and ‘chest of 3 drawers.’  FIG. 6  illustrates final-bid prices when the bids are placed as described in  FIG. 5 . In this case, the lowest bid price is assumed to be 100 won. 
         [0060]    Referring to  FIG. 5 , for the keyword ‘freckle,’ since only one bid is placed, the bid price is 100 won, and as shown in  FIG. 6 , the lowest bid price of 100 won is set as the final-bid price. 
         [0061]    In addition, for a keyword ‘100 th  day gift,’ since bids are placed by a plurality of advertisers and all the bid prices are the same, all the advertisers are given the same final-bid price of 100 won. In this case, since the bid prices are the same, but the final-bid rankings vary depending on the bid times, advertising information of an advertiser having a higher final-bid ranking is preferentially provided. 
         [0062]    Furthermore, since two or more advertisers have placed bids on keywords ‘double desk’ and ‘chest of 3 drawers,’ a bid price proposed by an advertiser having a lowest final-bid ranking is set as a final-bid price of the advertiser, and prices obtained by adding a preset price (for example, 10 won) to a bid price proposed by an advertiser ranked directly below each of the other advertisers are set as final-bid prices thereof. 
         [0063]    That is, an advertiser having a first final-bid ranking with respect to a keyword ‘double desk’ has proposed a bid price of 1100 won. However, irrespective of this, the final-bid price is set as 1010 won, which is obtained by adding 10 won to 1000 won that has been proposed by an advertiser having a second final-bid ranking. 
         [0064]    Returning to  FIG. 3 , when a keyword search request is received from a user terminal  300  in operation S 160 , the keyword search unit  130  performs a search using the received keyword and transmits a search result to the user terminal  300  in operation S 170 . In this case, in operation S 170 , one or more pieces of information are selected from among pieces of advertising information of one or more advertisers on the basis of the final-bid rankings set by the advertising processing unit  120  and transmitted to the user terminal  300 , together with the search result. In this case, the advertising information may be inserted into a predetermined region of a web page where the search result is displayed. 
         [0065]    When the advertising information is provided to the user terminal  300 , an advertising cost for the advertising information is calculated for each advertiser in operation S 180 . The calculated advertising cost is provided to the advertiser terminal  200 , such that a request may be made for payment of the advertising cost. 
         [0066]    In addition, the charging processing unit  150  may perform electronic payment processing on the calculated advertising cost in cooperation with the advertiser terminal  200 . 
         [0067]    The keyword advertising providing method according an embodiment of the present invention may be implemented as program instructions executable by a variety of computers and recorded on a computer readable medium. Here, the recording medium may include a program instruction, a data file, a data structure, or a combination thereof. The program instructions recorded on the computer readable medium may be designed and configured specifically for the present invention or can be publicly known and available to those who are skilled in the field of software. Examples of the recording medium include a magnetic medium such as a hard disk, a floppy disk, and a magnetic tape, an optical medium such as a compact disk read only memory (CD-ROM) and a digital video disk (DVD), a magneto-optical medium such as a floptical disk, and a hardware device specially configured to store and perform the program instruction, such as a read only memory (ROM), a random access memory (RAM), a flash memory, etc. Examples of the program instruction include a high-level language code executable by a computer with an interpreter, in addition to a machine language code made by a compiler. The above exemplary hardware device can be configured to operate as one or more software modules in order to perform the operation of the present invention, and vice versa. 
         [0068]    Although specific embodiments have been illustrated and described herein, it is obvious to those skilled in the art that many modifications of the present invention may be made without departing from what is intended to be limited solely by the appended claims. While preferred embodiments of the present invention have been described using specific terms, such description is for illustrative purposes only, and it is to be understood that changes and variations may be made without departing from the spirit or scope of the following claims. 
         [0069]    According to the present invention, in the case of providing keyword advertising, when a bid is placed on individual keyword advertising, it is possible to further check a bid time in addition to a bid price of an advertiser, set a final-bid ranking in the order of higher bid price, set the final-bid ranking in the order of earlier bid time when advertisers have proposed the same bid price, set, as a final-bid price, a price obtained by adding a preset price to a bid price proposed by an advertiser ranked directly below each advertiser based on the final-bid ranking of the advertiser, and set the same final-bid price to advertisers who have proposed the same bid price, thereby maintaining a proper level of advertising cost and thus satisfying both the advertiser and the service provider providing keyword advertising even when there is excessive competition between the advertisers.