19. The non-transitory computer-readable storage medium of claim 16 , further comprising: analyzing a posting of content associated with the interaction to determine the at least one topic.
16. A non-transitory computer-readable storage medium including instructions that, when executed by at least one processor of a computing system, cause the computing system to perform a method comprising: determining at least one topic for potential presentation to a user based on an interaction of a connection of the user on a social networking system; determining a degree of separation between the user and the connection within the social networking system; determining a value of affinity between the user and the connection; determining a weight reflecting a value of interest similarity between the user and the connection; calculating a term based on the degree of separation, the value of affinity, and the weight reflecting a value of interest similarity; and combining terms associated with the at least one topic to generate a composite score associated with the at least one topic to determine whether to present the at least one topic to the user.