Others are spot on
to keep the motor unit stationary while you are using the attachment.
Back in the day, my Mom would use the old Johnson's Paste wax. Boy would the Handi-Butler polish a Dining room table. The speed of the buffing pad would burnish the wax and give a great, long lasting shine.
She would also use the paste wax on the hardwood floors and use the Miracle Head to buff them out. The shine would blind you.