When your “full awning” needs even more storage space or just a space to put those dirty bikes and boots.
Extra Guests… No problem
You might have unexpected guests and need to make them up a bed, almost impossible in a full caravan but no problem if you have an awning annex. There might be a call for keeping pets safely and comfortably out of the way by making them up a bed in the awning annex. There might also be a need to store food or valuables without worrying that it might attract any wildlife.