Abstract: A facility for tracking actions performed by users on content. The facility monitors items of content that are being tracked for a user, and detects actions performed by other users pertaining to the tracked content. Actions may be any activity performed by a user with respect to an item of content, such as replying to content, rating an item of content, or editing content. The facility collects tracking statistics and provides the tracking statistics for on-site presentation to users. Users thereby stay engaged in conversations around content because they can quickly determine whether additions have been made to the conversation since they last participated. The users may use the tracking statistics to directly navigate to new content. The facility may allow a user to characterize a relationship with one more other individuals and track actions performed by the characterized individuals.