Card money is a type of payment you can make with a plastic card. It works like this: When you go shopping, you swipe your card to pay for the items you want to buy. The store then takes the card number and sends it to a bank. The bank then takes the money from your bank account (that you linked to your card) and gives it to the store. You don't have to carry cash anymore, you just need the card and the money will be taken from your bank account.