Yes, you can share the wifi password with your friends and family members whom you trust. But there will always be a chance of a data breach if you share the main WiFi password. If one of your guests uses a device that has been compromised or infected with malware to log on to the principal network, the infection might spread to devices in your house that is linked to WiFi.
Guest WiFi is the safest way to give your visitors access to the internet through your existing network. The Guest network gives Internet connectivity to your friends‘ and relatives‘ devices but not your home network.
