Use local advertising if you want to show ad to users in a certain area on the map.So you can tell about your cafe, beauty salon or shop to people who are nearby now, were recently or often are nearby: for example, live or work near you.
Correspondence table: id - name of the region To determine the location of users, we take into account the GPS signal, IP address, Wi-Fi environment and the nearest cell towers.
More about how to define geography.