Aspects of the technology described herein increase the efficiency of a search session by determining whether fresh content is likely to be responsive to the user's query. Whether fresh content is likely to be responsive to a specific query is determined by retrieving social media posts that are responsive to the query. The social media posts are evaluated for virality, which is the tendency of a social media post to be circulated rapidly and widely from one Internet user to another. The virality of a social media post can be determined by comparing a number of times the social media post has been re-communicated by individual users. Queries that return viral social media posts may be classified as seeking fresh content.
