You may wish to share your availability with an external website using iCal.
You can either grab the URL reference for the accommodation through the unit settings; go to Setup > Configuration > Units > iCal Calendars…
Or, if you need a full breakdown of all your accommodation, including individual pitches (sub-units), to go Tools > Third Party API’s > Syncing Calendars.
Every unit (and sub-unit, for camping) will have its own URL reference. We update these iCal files every 15 minutes or when the availability changes and the listing website will also have their set time to read the availability, so always allow time between the two to update.