There are four meeting roles. Organiser, the person who has set it up in their diary. The Active Member, who is a member of Hearsay and can use all the features. The Observer, who is a member of Hearsay, can use all the features but can’t be seen in the meeting. And finally, the Guest who can’t use the features but can see Agenda. You can also turn on and off their ability to see notes and actions.