It is a local area network gateway address, separating the gateways between local area networks, responsible for forwarding local area broadcasts, and the necessary place for internal and external network data exchange. According to the network protocol, a local area network must set a gateway. It's like a translator that can connect devices with different protocols, allowing users to perform unified operations on an app. For example, users can add sub-devices to the gateway to achieve unified control of devices such as switches, light bulbs, and curtains.