CONTROLLED DELIVERY OF ACTIVITY SIGNALS FOR PROMOTION OF USER ENGAGEMENT OF SELECT USERS IN COMMUNICATION SESSIONS

The disclosed techniques provide controlled delivery of stimulus notifications for promotion of user engagement of select users in communication sessions. A system delivers stimulus notifications targeting less-engaged attendees who is already in an event, such as a meeting. The stimulus notifications can be regarding happenings from different corners of the event that match the attendee's profile. For example, if the attendee has a profile that indicates they are interested in viewing their team members in an event where they are participating in an activity related to a predetermined sentiment, e.g., a positive sentiment such as performing a cheering gesture or generating specific emojis, the system will send that attendee stimulus notifications when that attendee has a low engagement level.