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.
*** Valid only on the UK Store
How to redeem:
* Open your Steam, go to your profile and select View My Wallet.
* Click on the Redeem a Steam Gift Card or Wallet Code.
* Enter your code voucher in the Steam Wallet Code column. After you done press Continue.
You will receive the code instantly by email.
No refund on digital products.
No exchange for ordering the wrong region or type.
Exchange is allowed only if the code was invalid.