Add the Steam gift card to your cart and proceed ... you’ll need to set one up. Various wallet options are available, such as online, mobile, or hardware wallets. Choose a reputable wallet ...

Picking up Steam Wallet codes can be a much cheaper way to play games. Whether you've got a Steam Wallet code from a friend ...

but because it's an entirely online store, you have to activate the cards with a code first. Redeeming these codes in the Steam Store will add the monetary value of the card to your Steam Wallet ...