What is cvv number on credit or debit card??? HD

DETAILS ABOUT THE CVV CODE PRINTED ON THE CREDIT OR DEBIT CARD support me :) subscribe : https://goo.gl/ed74HD Youtube : https://www.youtube.com/c/TechnoShineinfo Twitter : https://twitter.com/technoshineinfo Facebook : https://www.facebook.com/technoshineinfo/ Instragram : https://www.instagram.com/technoshine/ Google + : https://plus.google.com/u/0/+TechnoShineinfo Thank u.... keep smile :)