The document discusses ibeacons, small indoor positioning devices that utilize low energy Bluetooth technology to enable real-time, location-based engagements with smartphones. It outlines various applications of ibeacons across businesses, such as retail, restaurants, hospitals, and workplaces, highlighting their ability to deliver customized notifications, manage interactions, and enhance customer experiences. The document emphasizes the potential of ibeacons to redefine customer engagement strategies in 2015 and beyond.