1. A method comprising: enabling a set of users to interact with a system over a network, wherein a first user and a plurality of second users belong to the set of users; generating, for the first user, within the system, content for one or more application displays to be displayed to the first user; receiving, by the system, from each user from the plurality of second users, a corresponding specification of interest in being notified about interactions of the first user; in response to receiving first text that was input by the first user, the system performing the steps of: adding the first text to sharable content, wherein the sharable content includes at least a portion of content from the one or more application displays that were generated for the first user; and causing display of first information, in a respective application display of each user from the plurality of second users, based, at least in part, on the corresponding specification of interest of each user of the plurality of second users, wherein the first information includes an access identifier that provides access to the sharable content; receiving, from a particular second user of the plurality of second users, a specification of interest in being notified about interactions of another user, wherein the other user is a different user than the first user and the particular second user; in response to receiving particular text that was input by the other user, the system causing display of another information in the respective application display of the particular second user, based, at least in part, on the specification of interest in being notified about interactions of the other user, wherein the other information includes at least a portion of the particular text; and wherein the other information is concurrently displayed with the first information in the respective application display of the particular second user.