5. The method of claim 2 wherein dynamically updating user profile information further comprises: dynamically updating user profile information to increase a quantification of similarity level of a first user to a second user, based on the first user and the second user each separately taking an action indicative of interest in a common specific file, in a common specific file type, in common specific file content or in a common specific event.
2. The method of claim 1 further comprising: monitoring actions taken by specific ones of the multiple users directed towards files of the shared set and towards received notifications of events of the file sharing and collaboration environment; and dynamically updating user profile information, based on applying machine learning techniques to the monitored actions.