Go to your properties
Select or add a new property you'd like to add a location
Select Location (top left)
4. You've got two different ways of entering a property's location:
(1) You can tap on Get current location which will automatically set the current location if you are at the property itself. This way you don't have to fill it in yourself.
(2) You can just simply fill in an address yourself (if you're not on site of the prop or you want to enter manually)