A recurring reservation is a booking that automatically repeats at regular intervals, so you don't have to make the same reservation multiple times.
For example, a client might reserve a space in the Tuesday 6 pm class every week. Each future booking is created automatically until the series ends or is changed.
Recurring reservations are recommended because they help strengthen a Pilates habit, and the client needs to take action to cancel the booking, rather than to book.
Here all all the main help categories in the Appilates user manual.