CVV stands for Card Verification Value, sometimes also referred to as CVC (Card Verification Code), CVV-2 or CVC-2. The CVV code is an additional 3- or 4-digit security number that is printed (not embossed) on a credit card.
The CVV can usually be found on the back of a credit card on the signature strip. It would be the last three numbers listed there.
When applicable we recommend you enter the CVV along with your credit card number.