@wvi @marquisdegeek during the event, it's mainly taking care of running the agenda, so a quick intro of each speaker when it's their turn, passing the mic around in the audience for questions, ensuring presentation + Q&A don't run out of time (schedules are usually packed, and time is limited), and more in general dealing with issues that could happen there (e.g., keeping in touch with the A/V team if video goes out or slides don't work, things like that)