Promo Codes are are different promotions that DraftKings offers its users in order to give them odds boosts, free bets, or deposit incentives. Some of the most common promotions are risk-free bets, odds boosts, and deposit bonuses. Promo Codes have expiration dates, so make sure you claim and use them before it's too late. If you miss a certain promotion, don't worry--DraftKings offers tons of different promotions, and you can see which ones are available now right here.