1. A method of analyzing search behavior, comprising: storing data associated with a search and use of a plurality of search results; identifying one or more of the plurality of search results as a session of related search results; calculating one or more relevance factors for each search result included in the session of search results; and providing a relevance classification for each search result included in the session of search results based on a relevance of each search result to a search query that was used to locate each search result.