Visa and MasterCard mentioned on the credit and debit cards that you use have an important significance of their own. They are the names of the service provider who actually processes the transaction that you tend to make. These are the companies or you call them the service provider for the card. The card that we use has a company that will process the transaction that we are making in the ATM or using these cards anywhere. These are the service provider who will process your transaction. So in case you have a card that has Visa printed on it, that will mean that the service that is going to be provided to you is going to be done by a company called Visa and the same will stand for all those cards that have MasterCard printed on it. That is the clear significance of the presence of these names printed on these cards.