Every Google Meet conference offers two ways to join.
Join by Web-Link (Example: https://meet.google.com/prq-sniq-wft)
Join by Phone (Example: +1 669-220-6003 PIN: 247 509 530#)
The organizer of the meeting will setup the meeting and send you the link or phone number.
If the organizer elected to schedule the meeting ahead of time via Google Calendar and you are invited you should receive an email similar to this.
If you have been invited to any upcoming meeting you will be able to see and join them directly from the Meet website at https://meet.google.com