Steam Giftcards - Wallet Vouchers
Steam Gift Cards work just like gift certificates, which can be redeemed on Steam for the purchase of games, software, hardware, and any other item you can purchase on steam.
Steam Wallet Vouchers
Steam is a video game digital distribution service by Valve. Steam Wallet is a digital-banking tool used by Steam to allow users to add funds to their Steam account. Steam Wallet allows users to purchase games with funds in their accounts instead of directly using their credit or debit card.