Google Home is the link between your Roomba robot cleaners and your Google Assistant voice commands. When you make a voice command, it first goes through your Google Home app on your phone/tablet, and then it communicates with your Roomba. This makes it important that your Roomba is connected to Google Home. If you fail to connect your Roomba robot with Google Home, it could indicate out of date software. Update the software on your Google Home, iRobot Home app, and Roomba robot, and you are good to go. If not, retry the connection process detailed above.