Where it is
Schedule → Waitlist holds everyone waiting, with what they want and when they are free.
How people join
Customers ask to join from your booking page when the time they want is unavailable, and you can add someone yourself.
What happens when a spot opens
When a matching appointment is cancelled, OperMae notifies waiting customers that the time is available so they can book it.
What it does not do
The waitlist never books anyone automatically, and a waitlist entry never holds or blocks a slot on your calendar — the time stays genuinely bookable by anyone until it is booked.
Keeping it useful
Remove entries once they are booked or no longer relevant, so the list stays worth reading.