See https://support.zoom.us/hc/en-us/articles/201362233 for more details.
Before each remote session, our staff will notify you about the coming session and its associated meeting ID.
When the time comes, simply start Zoom client that you have installed on your device, click Join a meeting, and enter the meeting ID that we have sent you over emails. Please note each session will have a unique meeting ID.
See https://support.zoom.us/hc/en-us/articles/201362193 for more details.