With a PSN gift card you can top up your PlayStation credit. You can use this PSN credit for all purchases in the PlayStation Store, including in-game credit, such as Fortnite V-Bucks, FIFA Points, GTA 5 Shark Cards, Call of Duty Points and Apex Coins. You can also use your PS credit to buy or renew a PlayStation Plus membership. You do not have to order a PlayStation Plus Card separately.