A no deposit bonus for existing customers is a promotional offer provided by online casinos or betting sites, allowing loyal players to enjoy additional funds or free spins without needing to make a new deposit. This incentive rewards customer loyalty and encourages continued play, giving users a chance to explore new games or enhance their gaming experience without financial commitment. Typically, these bonuses come with specific terms and conditions, such as wagering requirements, but they serve as a great way for players to maximize their enjoyment and potential winnings.