This section will allow the users to record 'lunch break' / 'closing early' / similar to make it visible to the user making the bookings that new bookings cannot be entered for that time.
As per the booking - right click on the calendar and clicking on New Restrictions
Recurrence
You can set a booking up to be a recurring booking, this means it will repeat multiple times.
The above form should be self explanatory (it is the same form that you would use in Outlook Calendar).