Geofencing is a specific geotargeting strategy that involves drawing a virtual perimeter around the area you want to target. This approach allows you to target promotions or other content to users who are in a specific area or who enter that area. For instance, an international fast food brand with different regional hamburgers might send a user a notification for the special California burger when they cross the state border. A geofence can be large or small — it can be used to target a specific zip code, neighborhood, or building, or used to target an entire state or country.