15. The computer-readable storage medium of claim 14 , further comprising ranking the search results based on the search expertise level.
15. The computer-readable storage medium of claim 14 , further comprising ranking the search results based on the search expertise level. 16. The computer-readable storage medium of claim 15 , further comprising ranking the search results based on how often skilled searchers visit a page represented by a search result, such that a first page visited by a skilled searcher more frequently than a second page is ranked higher in the search results than the second page.