16. A non-transitory machine readable medium embodying a set of instructions that, when executed by at least one processor, cause the at least processor to perform operations, the operations comprising: storing a plurality of content items in a database of an online computerized social networking system, the plurality of content items generated by a plurality of members of a social networking system; detecting a plurality of interactions initiated by a member of the plurality of members with respect to the plurality of content items; determining a topic of interest of the member based on the detecting of the plurality of interactions and based on a similarity between a plurality of subjects corresponding to the plurality of content items; and based on a detecting of an action by the member pertaining to the topic of interest, automatically generate a notification for presentation in a user interface on a computer system of the member, the notification including a recommendation of a context pertaining to the topic of interest of the member, the recommendation of the context identifying a relationship between the topic of interest and a subset of the plurality of content items stored in the database of the online computerized social networking system, the subset of the plurality of content items being maintained by a group of the plurality of members separately from content items that are generally-accessible by the plurality of members.
16. A non-transitory machine readable medium embodying a set of instructions that, when executed by at least one processor, cause the at least processor to perform operations, the operations comprising: storing a plurality of content items in a database of an online computerized social networking system, the plurality of content items generated by a plurality of members of a social networking system; detecting a plurality of interactions initiated by a member of the plurality of members with respect to the plurality of content items; determining a topic of interest of the member based on the detecting of the plurality of interactions and based on a similarity between a plurality of subjects corresponding to the plurality of content items; and based on a detecting of an action by the member pertaining to the topic of interest, automatically generate a notification for presentation in a user interface on a computer system of the member, the notification including a recommendation of a context pertaining to the topic of interest of the member, the recommendation of the context identifying a relationship between the topic of interest and a subset of the plurality of content items stored in the database of the online computerized social networking system, the subset of the plurality of content items being maintained by a group of the plurality of members separately from content items that are generally-accessible by the plurality of members. 17. The non-transitory machine readable medium of claim 16 , further comprising selecting the context from a plurality of contexts based on a relevance of the context to the member in comparison to a relevance of an additional context of the plurality of contexts to the member.