The Orbi router has a lot of features and one of the features is Guest network. When you enable the guest network, you just create a sperate network with data limitations so that it will not interrupt the regular Orbi network. It is used to provide Orbi internet services to your guests with different SSID credentials. https://orbiloginmesh.net/how-to-enable-netgear-orbi-rbr50-guest-network-2025/