Tags give the ability to mark specific points in history as being important
Android 6.0.1 Release 77 (M4B30Z)
Android CTS 5.1 Release 14 (3506425)
Android CTS 6.0 Release 13 (3530687)
Android CTS 7.0 Release 4 (3542264)
Android 7.0.0 Release 24 (NBD91U)