Admin access allows the person full control over the location, such as the ability to change the Access permission level to other contacts – there can only be one such user at this time. The Admin role is automatically assigned to the account holder who first created the Location.
Note: Admin vs Primary Contact
The Admin owner for a location refers to the owner of the location – this is the person who setup the Location under their own account. This is not to be confused with a Primary Contact for a Location, which is simply a contact who gets automatically added onto notifications & reports for locations.