Riot points Gift Card can be redeemed for RP which can be used to buy in-game content for League of Legends or Team Fight Tactics.
To redeem your card/code in either of these games you will need to log onto the League of Legends client and follow these steps:
1. Click on the “Store” button.
2. Click on the “Purchase RP” button.
3. Select the “Prepaid Cards & Codes” option.
Make sure that the consent box is checked (as shown in the picture below), otherwise, you will not be able to complete the purchase.
4. Input the card’s PIN in the bar and hit “Submit”.