Methods and systems for providing a response to a query. Multiple users' search engine activity in regard to a query is correlated. A response is provided based upon this correlated search engine activity information. For one embodiment of the invention, in the context of search engine result optimization, the user activity and/or user information of multiple users, during a search session, is correlated with queries to effect an evolving association between queries and the organization and presentation of documents. Systems in accordance with such embodiments employ the ability to store users' activity over the entire search session, thus making possible the correlation of a number of different types of user activity and user information. The use of correlated user input allows such systems to provide relevant search results without the limitations imposed by the key-word-based systems of the prior art.