Many abilities may refer to Locations, this is the way the game breaks up how interesting places occur in a game.
The size of a location can change depending on the size of your campaign, but you can use the two following guidelines to help you
If you’re playing a game that involves regularly moving from town to town in, then a Location is every town you visit and every notable wilderness spot that may have a name. The city of Alderan is a location as is the Great Tree in the depths of the wilderness.
If you’re playing a game that largely focuses around one city, then a Location can be every district or distinct region or major building of that city.