A buffer period is a set period of time which must be kept free between bookings to allow for the orderly changeover of groups or for cleaning, etc. During the buffer period, a room is not available to be booked even though there will not be anyone recorded as using it within your calendar.
For example, if you define the buffer period as 30 minutes, and have a Pilates Class booked in a room between 9am and 10am, it is not possible to book the room after 8.30am or before 10.30am.
To define your buffer period, click click Settings in the navigation bar then click on Calendar Settings. Within the Calendar Settings pane, enter the buffer period and then click Save Changes.
Existing bookings are not affected by your new buffer period, except if you edit them and change the room booked or the times of the booking.