Google Nearby Notifications were a proximity marketing tool using Bluetooth beacons and location-based data to serve content relevant to an Android user's real-world location. Launched April 1, 2015; shut down December 6, 2018 — it lived 3 years. One of 15 Google products killed in 2018. https://android-developers.googleblog.com/2018/10/discontinuing-support-for-android.html Data: Killed by Google (killedbygoogle.com, MIT).