
Other devices on the same network can establish connections to your PC and use its shared resources when the network profile is set to Private. Use this network profile for networks your can trust. When you choose the Private network profile, the OS will configure your connection as a Home network and turn on network discovery. In case of the Public network profile, Windows will disable network discovery, so other devices on the same network won’t find your PC and will be not able to connect to your PC. Usually, it is public hotspots in an airport, hotel and so on.

The Public profile should be set when you are connected to a network you don’t trust. When you are signing in to your account for the very first time, the OS asks you to set your network location type to either Public or Private. You can change the current network profile to Public or Private at any moment. This post explains how to set your network as Public or Private.
