A cutoff time prevents last minute bookings of appointments. It ensures your staff have enough time to make it in to teach.
If you set this time period to, say, 60 minutes, this will ensure your instructors will always have at least an hour heads up that they need to be in the studio.
This setting can be calibrated on the Appointment Settings page (pictured below) but can also be overridden at the board level (pictured above) by clicking Appointments > Boards > editing the board > scrolling to Cut-off time (under the section for Checkout).
Cutoff times are added in minutes.
