This feature is important to setup if you anticipate using any region specific filtering within the site.
Highlights of this feature:
Regions and their subregions are managed here in the admin tool:
GEOGRAPHIC SETUP > REGIONS
Once you are at the above admin tool you'll see the following:
Within that screenshot you'll see:
You can set the labels used for each region level per language for the whole site within the following admin tool:
GEOGRApHIC SETUP > LEVELS
The country and state choices within the region selection automatically by default populate the country and state fields in the user registration data and the listing data.
You can enable region level, force a region level to be a required choice, allow editing of their choice after placement and control where these field appear within the Geographic Regions section of the following admin tool:
LISTING SETUP > FIELDS TO USE