Once you’ve received your Steam gift card code, using it in the Steam store is easy—just follow these steps:
The top-up amount will be added to your Steam Wallet balance and the new account balance will be displayed.
Please note: The first time you top up your Steam Wallet, you’ll likely be asked to enter your address. This is so Steam can determine the correct currency.
By using this service, you consent to the terms and conditions of Steam.