A system for classifying and managing keywords across multiple campaigns comprises a classification manager, a bid management system, a web analytics tool and a search engine. The classification manager interfaces with the bid management system and the web analytics tool to provide user interfaces for reviewing data about specific keywords across multiple campaigns. The classification manager includes a classification keyword repository, a classification creation module, a classification measurement module and a classification user interface module for generating the user interface. This is particularly advantageous because statistics corresponding to keywords can be classified across multiple campaigns to provide greater flexibility in the analysis of web data. The present invention also includes a novel method for the classification of keywords across multiple campaigns.