Hello @ziggy86
For Nest WiFi Pro, all three bands will be using a common network name (SSID). This allows each device to make its own decision about which band to connect to based on what that device is capable of and what signal quality is available to that device in its current location. It also makes it possible for devices to smoothly switch from one band to another without closing any open connections. For example, a device that connects initially to 2.4GHz when you approach your home (for example, a mobile phone in your garage when you get home) can switch to either 5GHz or 6GHz when you come into the house and those options become better. That's the theory, anyway, and for many client devices it works quite well. However, there are some devices that don't do a great job of managing this situation. Some devices may connect to 2.4GHz to start with (e.g., in the garage), and then just stick with that since it still works after coming into the house. If you had separate network names for each band, all devices would work this way, though – even the ones capable of switching smoothly between bands. So, in general, the common SSID approach should be better, especially as more devices get better at it.
You can tell which band each device is currently connected to by looking at the "info" tab for that device in the Google Home app. That will indicate which access point and which band that device is currently connected to.
