1. Launch the Steam client on your computer.
2. Click on "Games" at the top left and select "Activate a Product on Steam."
3. Follow the on-screen instructions and enter the code you want to redeem.
4. Click "Next" and accept the terms of service if required.
5. The game or content will be automatically added to your library and can be downloaded and played.

Make sure you enter the code correctly to redeem it successfully. If you have any further problems or questions, please feel free to contact us.