CVV stands for Card Verification Value, which is a unique code printed on payment cards thats used to authorize payments made online or over the phone. It is a security feature that helps protect you from credit card fraud by providing an extra layer of protection. CVV numbers are not the same as your cards PIN (Personal Identification Number). Here are some key points to know about CVV:

• CVV numbers are usually three digits on Visa, Mastercard, and Discover credit and debit cards, and four digits on American Express cards.
• CVV numbers are not stored in the payment gateway and will therefore be requested each time you make a transaction.
• CVV numbers are located on the back of most cards, although in some cases they may be found on the front.
• CVV numbers are also known as CSC numbers (Card Security Code) and CVV2 numbers.
• Dynamic CVVs are a newer type of verification code that changes from time to time, making them more secure. Some dynamic CVVs are displayed on a mini-screen on the back of the card, and others are sent to you via text message or an app.

Its important to keep your CVV number secret and never share it with anyone, as it can be used to complete online transactions.