Open Steam and sign in to your account
Click your username or the Games menu
Select Redeem a Steam Wallet Code or Activate a Product on Steam
Enter the Steam code exactly as provided
Confirm the code
Check your Steam Wallet balance or library for the added content
If the code is for a game, download or install it from your library
If the code does not work, verify it has not already been used and that it matches your region or account requirements