You can plug in your Google Home device by following these two steps.
Step 1: Plug the power cable into your Google Home device.
Step 2: Plug the power adaptor into a wall socket.
It's important to only use the power cable that came in the device's box. Once the device is plugged in, start setting up your Google Home device.
The Google Home device must be plugged into a wall socket at all times to work. It doesn't have a battery.