Discover Cardholders: 5% Off Walmart Gift Cards when you Redeem Discover Cashback to purchase the gift cards from Discover's redemption portal. Go to the Discover Cashback Redemption page and login if prompted. https://portal.discover.com/customersvcs/universalLogin/logoff_confirmed#/giftcard Under Gift Cards, click the browse button Search for/select Walmart Select a denomination of your choice Proceed to checkout to redeem your Cashback for this reward