1. A method, comprising: performing, using a computer: assigning a unique identifier to each of one or more keyword-advertisement pairs used for implementing an advertising campaign; assigning particular portions of analytics data resulting from the implementing the advertising campaign to particular ones of the unique identifiers assigned to respective ones of the one or more keyword-advertisement pairs such that each particular portion of the analytics data shares a unique identifier with a keyword-advertisement pair of the one or more keyword-advertisement pairs; receiving, via a user interface, advertisement campaign information comprising: one or more keywords to be purchased; and one or more advertisements to be displayed in response to activation of one or more of the keywords; generating a plurality of keyword-advertisement pairs, wherein each of the keyword-advertisement pairs specify: at least one of the keywords to be purchased; and one of the advertisements to be displayed in response to activation of the at least one of the keywords to be purchased; receiving, via the user interface, a request for an estimate of performance of the advertisement campaign; determining, in response to receiving the request for an estimate of performance of the advertisement campaign, an estimate of one or more analytic metrics for the one or more keywords to be purchased, wherein the estimate of performance of one or more analytic metrics for the one or more keywords to be purchased is based at least in part on historical information, and the estimating further comprises reviewing metrics for ones of the one or more keyword-advertisement that are selected for re-use; and providing, for display via the user interface, the estimate of one or more analytic metrics for the one or more keywords to be purchased.