They both deal with not-static advertising. You suggest the number of the demonstrations of your banner or advertising text a day and the general number of demonstrations. Your advertising is to be measured carefully and to be assigned among the days and during the day. Dynamic demonstrations are generally used in case you have to inform a wide range of people about the appearance of new goods, services or trademarks. Dynamic demonstrations are classified to image advertising.
Corresponding materials are to be demonstrated to the users whose request contains the chosen words.
It's possible and necessary sometimes. The thing is that a great deal of widely used words is looked for frequently while different things are meant. We are ready to supply the advertisers with the gained statistics of search requests and to suggest word combinations for context advertising. The more words or word combinations you give the wider audience will see your advertising. So, you'll miss all advantages of context advertising that enables to target people interested in your offers potentially.