There is an audible click when it's turned on/off so I assume it has a physical relay in it. Google Home gives it a plug icon, but groups it with lights, and a voice command to turn on the lights in a room includes this plug. Philips hue turns it on as part of every “scene”.
So if you want to use it for anything that you don't want turned on/off with the rest of the lights in a room, you will have to assign it to a different room.