What is Google Nest Wifi and how does the mesh network work?

Google Nest Wifi is a mesh network system. Essentially, it connects to your existing router to give you a strong Wi-Fi connection throughout your home. If you move rooms, the idea is that you seamlessly move to the next network node, without having to physically switch network.

Source : https://www.pocket-lint.com/what-is-google-wifi-and-how-does-the-mesh-router-work/