If you don't have an account on the platform yet, you can create one here: create a PlayStation account.
1. Turn on your console and log in to your PlayStation Network account.
2. Go to the PlayStation Store.
3. Scroll to the side, select the three dots, and then choose “Redeem Code”.
4. Enter the 12-character code and Redeem it.
The game will be added to your account and will be available for download.