The Home category is a special type of spot, which marks where your home harbor is.
If you mark a spot as your Home, the Orca will automatically use the Home harbor as your starting point for routes when Orca detects that you are on land. When you are at sea, your current location will be used as a starting point for routes.
If you assign multiple home harbors, Orca will use the nearest one as the starting point for new routes. The video below shows you how to assign the Home Harbor category to a Spot.