If you are looking to get discount codes for your games via Steam, using a Steam store promo code is the way to go, and apply a Steam coupon at the checkout. Go to the checkout page and type in the code in the box named Redeem Promo Code found on the right-hand side of the page. To redeem the code, open the game, click the cogwheel on the top-right, click Coupon Code, enter your code, and choose Enter.
Steam offers are free to use, and if you keep going through the steps in the next section, you will see just how simple it is to use your code and finalize an order on Steam. When you add a particular Steam game to your cart, the coupon is applied automatically, and you’ll be getting the discount.
Your discount or rewards are automatically taken away when you buy an eligible game or item. If you are a GAME Elite Member, you will also get access to exclusive deals, and games will even send you a free gift on your birthday. Steam offers are free to use, and if you keep going through the steps in the next section, you will see just how simple it is to use your code and finalize an order on Steam. 
If you are buying games from somewhere other than Valve, like 3rd party game sites that resell games or provide games at a cheaper rate, chances are that you are given an activation code that you can use to redeem an item on Steam. You can do that by typing the opening Steam on PC, clicking on ADD game on the bottom left corner selecting to activate a product on Steam, entering the CD activation code you received and you’re all set to go.
If you bought or received a Steam gift card or wallet code, you will need to activate that first in order to use that as a payment method. Steam gift cards and Steam wallet codes are digital cards that you can use to purchase games, downloadable content, or other paid-for items within a game.
Customers can purchase games or in-game content with the retailer’s code, and CDKeys has pre-order discount codes. The codes are created by the game developers (aka BIG Games) and are given away fairly frequently so check back their socials to see if there are any new ones that pop up.
Steam sales offer various discounts, and sometimes you may also be able to score a free Steam game, although the games might only be available for a limited period. In addition to hosting a great Black Friday video game sale, Steam offers some great discounts on other occasions like the currently ongoing Steam Game Fest where Studio Wildcard offered ARK for free to claim.
