1. A method comprising: retrieving profile information related to a user of the social networking system, the profile information including the user's affinity for each of a plurality of tags, each tag associated with a question topic; selecting a set of questions stored in the social networking system based on question topics associated with the plurality of tags; for each question in the set of questions: determining a score for the question based on the user's affinities for a subset of the plurality of tags associated with the question; adjusting the score for the question based on one or more activities performed by the user in relation to another question associated with the subset of the plurality of tags; sorting the questions based on the adjusted scores for the questions; and providing one or more of the sorted questions in a question interface for display to the user.