How Do You Activate Your Product Key on Steam?

 To activate your Product Key on Steam, follow these steps:

 

 1 .Install the Steam Client Application. You can download it here.

 2 .Launch the app and sign in with your Steam account.

 3 .Select "ADD A GAME" as shown in the picture below, then choose "Activate a Product on Steam".

 4 .In the Product Activation window, select "Next".

 5 .Agree to the Steam Subscriber Agreement by selecting "I Agree".

 6 .Copy your Game Key and paste it into the Product Code field, then click "Next".