15. A non-transitory computer-readable medium storing instructions, the instructions comprising: one or more instructions which, when executed by a processor, cause the processor to: analyze query logs to identify a pair of queries that are the same except that a first query, in the pair of queries, includes an extra term that is not included in a second query in the pair of queries; identify, based on receiving information indicating that the pair of queries is associated with a threshold quantity of search results that are common between the pair of queries, the extra term as not significant; receive information indicating that another pair of queries is not associated with the threshold quantity of search results that are common between the other pair of queries, a first query, in the other pair of queries, including the extra term and a second query, in the other pair of queries, not including the extra term; identify a context in which the extra term is significant, the context in which the extra term is significant being based on the information indicating that the pair of queries is associated with the threshold quantity of search results that are common between the pair of queries; and store information including the extra term, an indication that the extra term is not significant, and the context in which the extra term is significant.
15. A non-transitory computer-readable medium storing instructions, the instructions comprising: one or more instructions which, when executed by a processor, cause the processor to: analyze query logs to identify a pair of queries that are the same except that a first query, in the pair of queries, includes an extra term that is not included in a second query in the pair of queries; identify, based on receiving information indicating that the pair of queries is associated with a threshold quantity of search results that are common between the pair of queries, the extra term as not significant; receive information indicating that another pair of queries is not associated with the threshold quantity of search results that are common between the other pair of queries, a first query, in the other pair of queries, including the extra term and a second query, in the other pair of queries, not including the extra term; identify a context in which the extra term is significant, the context in which the extra term is significant being based on the information indicating that the pair of queries is associated with the threshold quantity of search results that are common between the pair of queries; and store information including the extra term, an indication that the extra term is not significant, and the context in which the extra term is significant. 19. The medium of claim 15 , where the instructions further include: one or more instructions to determine a first score for a first document of a plurality of documents, the first document including the extra term; one or more instructions to determine a second score for a second document of the plurality of documents, the second document not including the extra term, and the first score being greater than the second score.