Epic Games Store is a storefront for games which is available through Epic Games' launcher application and web. Both solutions allow players to purchase games and redeem codes, while via the launcher the user can also install and keep their games up to date.
Newer games published by Epic are exclusively available on PCs through Epic Games Store. In July 2019 cloud saving was introduced to catch up to common standards in other games launchers. Epic also introduced “Support a Creator” program, which allows supported streamers to receive revenue for every microtransactions made by their viewers on Epic Games Store.
Head to the Epic Games Store in your web browser and log in to your account (be sure you’re signing in with the account you want to redeem the code with).
Click on your username in the top right-hand corner. Next click on account, than click on redeem code in the left-hand menu.
Enter the code into the box and click redeem. Check if the code matches the game you're buying and click confirm. To install your game, you now have to go back to the Epic Games Launcher on your PC, where you'll find it listed in your library.