Adding a 4th level of locations means that your site members will be able to get into more details about their whereabouts, using dropdown menus from your site. Instead of the standard 3 levels Country > Region > City you will have Country > Region > City > City district/Neighbourhood/City area.
The 4th level can be a list of metro stations in a large city, or a super structure of countries as in Europe/Asia/America -> Country -> Region -> City.
You can go as far as to order 5th and further levels up or down the structure of locations.
|Version||Dolce (2014.4) and above|