BLE is a type of Bluetooth technology that is low energy. Hence the name - Bluetooth Low energy. BLE communication comprises of advertisements of small packets of data which are broadcast at regular intervals through radio waves. BLE broadcasting is a one-way communication method; it simply advertises its packets of data. These packets of data can then be picked up by smart devices nearby and then be used to trigger things like push messages, app actions, and prompts on the smart device.