How do I redeem my Apple Gift Card?

Are you referring to your Apple Gift Card or App Store & iTunes gift card?

You can redeem here ⇢ How to redeem your Apple Gift Card or App Store & iTunes gift card - Apple Support

Click ▶︎ Redeem an Apple Gift Card.

Good luck! 👋🏼😉

There is no such thing as an Apple Pay card. What are you trying to redeem? A gift card? Something else?