How do you paid credit card payment?

Imagine we are purchasing any good in a showroom. The showroom owner will ask us for payment. For this,we can give him credit card. He will insert that card into machine. Our credit card number will be saved there. Then, we will be asked for a signature to provide the bank a proof that we had given our acceptance. The shop owner will move to bank for his payment. The bank will provide him the money.