iBeacon is a new technology that extends Location Services in iOS. Your iOS device can alert apps when you approach or leave a location with an iBeacon. In addition to monitoring location, an app can estimate your proximity to an iBeacon (for example, a display or checkout counter in a retail store). Instead of using latitude and longitude to define the location, iBeacon uses a Bluetooth low energy signal, which iOS devices detect. To learn more about Bluetooth technology, see the official Bluetooth website.