A debit card, also called a check card, is usually linked directly to your bank account. Like the ATM cards of old, you can use a debit card and a PIN to get cash from your account at an ATM. You can also use a debit card to make purchases online, much as you would a credit card.
Use When it comes time to check out, type in your card's number as well as its expiration date. Some websites may ask for the card's security code, which is a three digit number printed on the back of the card.