Guest networking provides a way for users to access someone else’s larger network with limited permission. They are often operated by businesses but have become more common on home networks also. In home networking, a guest network is a local network controlled by the same router that controls its primary local network.
Guest networks improve network security. With a home guest network, for example, you can give friends access to your Internet connection without sharing your Wi-Fi password and also strictly limit what information inside your home network that they can see. They also keep the primary network protected from network worms that could otherwise be spread to other computers if a visitor plugs in an infected device.
Those of you with Bed and Breakfast might do well to have a guest network.
As it stands our standard router (Ubiquiti AirCube AC) does not currently have guest network capabilities – however it is due to have this capability in the next before the end July 2019.