A casino referral bonus is an incentive offered by online casinos to encourage players to invite friends to join the platform. When a referred friend signs up and meets specific criteria, both the referrer and the new player can receive bonuses, such as free spins or bonus cash. This mutually beneficial arrangement not only rewards existing players for their loyalty but also helps casinos expand their customer base. It's a win-win situation, enhancing the gaming experience while fostering a community of players. Always check the terms and conditions to maximize your rewards!