Both Microsoft and Xbox gift cards and download codes work in the same way: once redeemed to your Microsoft account, you can spend your balance at Microsoft Store online, on Windows or Xbox, and you can get downloads for the latest apps, games, movies, TV shows, and Surface, Xbox, and accessories.
Note: You cannot buy a Microsoft 365 subscription with a gift card.
STEP1: Once completed the purchase from SEAGM, kindly retrieve your game card code in "My Cards".
STEP2: Visit the official redemption site and proceed with Login/Register an account.
STEP3: Choose the right region by clicking the Profile if you are the first time to redeem Xbox Gift Card.
STEP4: Enter the code purchased from SEAGM and click "next".
STEP5: Once the transaction is completed, click close and the balance will be reflected in your account.