A small device using Bluetooth Low Energy (BLE) to communicate with other beacons and mobile app. Marketers use it to send customers 1-to–1 messages (SMS, push notification) in brick and mortar stores, and to advanced behavioral analytics. Thanks to beacons we can learn in which areas of the brick and mortar store customer spent most time and compare that with his purchases. If he spent a lot in the soap area, but didn’t buy any, maybe we should send him an offer with soap?