16. The computer system of claim 15 , further comprising a search query modification mechanism to identify a content tag and to modify the search query to include the identified content tag.
16. The computer system of claim 15 , further comprising a search query modification mechanism to identify a content tag and to modify the search query to include the identified content tag. 17. The computer system of claim 16 , wherein identifying a content tag comprises receiving a selected content tag from the user event tracker.