6. The method of claim 5 , where one or more advertisements are associated with the selected search result document, and where the method further comprises: receiving a request, from the user, to save one of the advertisements; saving the one of the advertisements in response to the request to save the one of the advertisements; and identifying the search query as commercial in nature based on saving the one of the advertisements.
6. The method of claim 5 , where one or more advertisements are associated with the selected search result document, and where the method further comprises: receiving a request, from the user, to save one of the advertisements; saving the one of the advertisements in response to the request to save the one of the advertisements; and identifying the search query as commercial in nature based on saving the one of the advertisements. 7. The method of claim 6 , further comprising: providing, to the user, links to product reviews, or to commercial documents or sites, that are related to the one of the advertisements when the search query is identified as commercial in nature.