1. One or more non-transitory computer-readable media storing instructions which, when executed by one or more processors, cause the one or more processors to perform a method comprising steps of: providing a computer-based service over a network to a set of users; receiving, by the computer-based service, from each user from a plurality of second users, a specification of interest in being notified about interactions of a first user; wherein the first user and the plurality of second users belong to the set of users; in response, at least in part, to receiving first text that was input by the first user, the computer-based service performs steps of: sending a first alert, in real-time, to each user from the plurality of second users, about input of the first text; and adding the first text to first content that is maintained by the computer-based service; selecting, by the computer-based service, to whom to send the first alert based, at least in part, on the specification of interest; and wherein the first alert includes the first text and a link that provides access to the first content.