A guest Wi-Fi network gives visitors internet access without putting them on your main network. It keeps your computers, printers, smart home devices, and other equipment isolated from anyone connecting through the guest network. This is important both for security and for privacy.
When someone connects to your main network, they can potentially see and interact with other devices on that network. A guest network is completely separate, so a connected device cannot reach your computers, network-attached storage, or smart home gear.
Connect visitors, smart home devices (thermostats, smart TVs, cameras), gaming consoles, and any device you do not fully trust to the guest network. Your computers, phones, and tablets that handle sensitive information stay on the main network.