To be a conference host, you must:
To do your job, you will need the Zoom client installed on your device (not a phone, as you'll have to share screens with writers).
Always log in via UR's Zoom portal, not via any private Zoom account you use. This tends to offer better security for conferences.
Assigned to a class? Set up your own Zoom Room and notify writers.
UR provides good technical tips for Zoom here.