9. A computer program product comprising a non-transitory computer-readable storage medium storing computer-executable code comprising instructions for: storing a plurality of social network groups and user interactions performed by users of a social networking system with the plurality of social network groups; associating a set of social network groups of the plurality of social network groups with a category; selecting a set of users associated with the set of social network groups, comprising, for each social network group from the set of social network groups: identifying users performing user interactions with the social network group; for each identified user, determining a measure of user interactions of the user with the social network group; and including the user in the set of users, responsive to the measure of user interactions of the user with the social network group exceeding a threshold; selecting a set of candidate social network groups associated with the set of users, based on user interactions of users from the set of users with the candidate social network groups; receiving, by a computer, keywords associated with the category; searching for keyword occurrences in content associated with each candidate social network group provided by the users of the social networking system; determining whether each candidate social network group is associated with the category based on the keyword occurrences; storing information describing the category associated with the one or more of the candidate social network groups; providing information describing a particular social network group to a user for performing an action, the information provided based on the category.
9. A computer program product comprising a non-transitory computer-readable storage medium storing computer-executable code comprising instructions for: storing a plurality of social network groups and user interactions performed by users of a social networking system with the plurality of social network groups; associating a set of social network groups of the plurality of social network groups with a category; selecting a set of users associated with the set of social network groups, comprising, for each social network group from the set of social network groups: identifying users performing user interactions with the social network group; for each identified user, determining a measure of user interactions of the user with the social network group; and including the user in the set of users, responsive to the measure of user interactions of the user with the social network group exceeding a threshold; selecting a set of candidate social network groups associated with the set of users, based on user interactions of users from the set of users with the candidate social network groups; receiving, by a computer, keywords associated with the category; searching for keyword occurrences in content associated with each candidate social network group provided by the users of the social networking system; determining whether each candidate social network group is associated with the category based on the keyword occurrences; storing information describing the category associated with the one or more of the candidate social network groups; providing information describing a particular social network group to a user for performing an action, the information provided based on the category. 14. The computer program product of claim 9 , wherein the content associated with each candidate social network group comprises one or more of messages sent by users associated with the candidate social network groups, content uploaded to the social networking system by users associated with the candidate social network groups, and content retrieved from the social networking system by users associated with the candidate social network groups.