The techniques disclosed herein provide a notification to a user that has been invited to participate in a communication session (e.g., a virtual meeting such as a video conference). The notification informs the user of contextual information associated with a meeting and provides a mechanism for the user to efficiently join the meeting. The notification can be provided based on different types of join events signaling that the meeting may be able to start. One type of join event can occur when the first person joins the meeting. Other types of join events can occur when an organizer of the meeting joins the meeting, when a required attendee is the first required attendee to join the meeting, when an external user is the first external user to join the meeting, or when a representative from each of a plurality of different stakeholder groups has joined the meeting.