Amazon gift cards are prepaid gift coupons that allow the users to pay via gift cards while shopping on Amazon. To use the gift cards you need to visit amazon.com/redeem
and enter the redeem code of the respective Amazon Gift card. You have to find the gift card redeem code that is embedded on the backside of the gift card. After that enter the gift card code at amazon com redeem URL. If you want to redeem the Amazon Gift card without any errors and via the easiest way then follow the guideline to redeem the gift card here.