The document discusses several classes used for beacon monitoring and detection in iOS such as CLLocationManager, CLBeaconRegion, and CLBeacon. It notes properties of each class like proximityUUID, major, minor used to identify beacons. It also mentions Eddystone beacon formats including Eddystone-URL, Eddystone-UID, Eddystone-TLM that can be detected by both Android and iOS devices using Bluetooth Low Energy.