A casino promo code is a special alphanumeric code that players can use to unlock exclusive bonuses and promotions at online casinos. These codes often provide benefits such as free spins, deposit matches, or no-deposit bonuses, enhancing the gaming experience and increasing winning potential. To redeem a promo code, players typically enter it during the registration process or when making a deposit. Utilizing these codes can significantly boost a player's bankroll, making it an essential tool for both new and seasoned gamblers looking to maximize their online casino experience.