Homepages are stored on thousands of computers around the world. Each homepage has an address, or a location, which is called a URL, Universal Resource Locator. The ability to quickly link from site to site is the most powerful aspect of the World Wide Web. Knowing where to find information quickly and systematically will save a lot of time. Search engines will assist you in that process.
Search engines are on-line tools.
Search engines find web resources by scanning the Internet using key words and phrases that are entered or defined as parameters. When the search is complete, a list of resources, links, related to the search appears on the screen. Each resource is a link to another site on the web that can be accessed with a click of the mouse. A search engine works much like a card catalog in a library. Since there are so many different resources available on the Internet, it is difficult to find necessary information.