11. A computer readable medium for storing executable instructions, which, when executed in a processing system, cause said processing system to perform targeting, the instructions for: identifying a set of keywords associated with content information requested by a user over a network; retrieving advertising information corresponding to said set of keywords; retrieving user profile information associated with said user, said user profile information comprising a user matrix, said user matrix comprises, for said set of keywords and said corresponding advertising information, click-through-rates associated with said user and a bid price for said advertising information; filtering said advertising information to select advertisements based on said bid price for said advertising information and said corresponding click-through-rate associated with said user identified in said user matrix for said set of keywords; and providing said advertising information selected to be displayed for said user in connection with said content information.
11. A computer readable medium for storing executable instructions, which, when executed in a processing system, cause said processing system to perform targeting, the instructions for: identifying a set of keywords associated with content information requested by a user over a network; retrieving advertising information corresponding to said set of keywords; retrieving user profile information associated with said user, said user profile information comprising a user matrix, said user matrix comprises, for said set of keywords and said corresponding advertising information, click-through-rates associated with said user and a bid price for said advertising information; filtering said advertising information to select advertisements based on said bid price for said advertising information and said corresponding click-through-rate associated with said user identified in said user matrix for said set of keywords; and providing said advertising information selected to be displayed for said user in connection with said content information. 14. The computer readable medium according to claim 11 , wherein said instructions for providing further comprises instructions for: retrieving advertising information corresponding to said set of resulting keywords; ranking advertisements within said advertising information based on at least one parameter; and transmitting a predetermined number of top ranked advertisements to said user.