Geofencing is a location-based technology that creates virtual boundaries or fences around specific geographical areas. These virtual boundaries can be defined using GPS, RFID, Wi-Fi, or cellular data. By using geofencing, businesses and organizations can trigger notifications, alerts, or actions when a mobile device enters or exits a predefined area. Geofencing is commonly used in marketing, security, logistics, and other applications to enhance location-based services and improve user engagement and experience.