An appointment slot interval determines how often a new appointment can start on your schedule.
For example, if you set the interval to 15 minutes, appointments can begin at 6:00, 6:15, 6:30, etc. If you choose 60 minutes, appointments can only start at the top of each hour. This setting helps control the flow and timing of bookings and can be adjusted for each board or set as a default for all boards.
Not only that. You can also toggle on "Allow bookings only at a specific time each hour" to indicate that customers are only allowed to book appointments at a specific point in the hour. For instance, at the top of the hour (:00), at half past every hour (:30), etc. All appointments will only be bookable by customers with a start time that fits the requirement.
To find this setting, click on any existing appointment board > click Actions > Edit Board > find the 'Scheduling' section.
You can also set these interval options for all boards at once by heading to Appointments > Actions > Appointment settings.