19. The system of claim 15 , wherein the instructions, when executed, cause the system to also: identify a first user associated with the message and a group of one or more second users associated with the first user; and generate the graphical user interface data for providing an access to the group of one or more second users.
15. A system comprising: a processor; and a memory storing instructions that, when executed, cause the system to: determine one or more topics associated with a message based at least in part on message data included in the message; determine knowledge data describing the one or more topics associated with the message; determine social activity data describing one or more user activities associated with a group of one or more social users based at least in part on the knowledge data, the one or more user activities describing the one or more topics; generate a selectable tag based at least in part on the social activity data describing the one or more user activities, a selection of the selectable tag causing a display of the social activity data associated with the message; and generate graphical user interface data for displaying the social activity data associated with the message in response to the selectable tag being selected.