9. The system of claim 8 : wherein receiving the request for content from the user comprises receiving a search query from the user; wherein using at least a portion of the accessed information descriptive of content accessed by the user during the time period to identify content to provide in response to the request for content comprises: adjusting the received search query to include at least a portion of the accessed information descriptive of content accessed by the user during the time period, the at least a portion of the accessed information including at least one word identified as being descriptive of overall content included in an electronic document browsed by the user during the time period, and identifying search results using the adjusted search query; and wherein providing the prioritized results in response to the request for content comprises providing the identified search results responsive to the adjusted search query.
9. The system of claim 8 : wherein receiving the request for content from the user comprises receiving a search query from the user; wherein using at least a portion of the accessed information descriptive of content accessed by the user during the time period to identify content to provide in response to the request for content comprises: adjusting the received search query to include at least a portion of the accessed information descriptive of content accessed by the user during the time period, the at least a portion of the accessed information including at least one word identified as being descriptive of overall content included in an electronic document browsed by the user during the time period, and identifying search results using the adjusted search query; and wherein providing the prioritized results in response to the request for content comprises providing the identified search results responsive to the adjusted search query. 10. The system of claim 9 wherein adjusting the received search query to include at least a portion of the accessed information descriptive of content accessed by the user during the time period comprises: identifying at least one additional search term that is not included in the received search query and that is included in the accessed information descriptive of content accessed by the user during the time period; and adjusting the received search query to include the identified at least one additional search term.