A no deposit sign-up bonus is a promotional offer from online casinos or sportsbooks that allows new players to receive bonus funds or free spins without having to make an initial deposit. This incentive is designed to attract new customers and give them a chance to explore the platform without financial commitment. Players can use the bonus to try out games or place bets, but they often need to meet specific wagering requirements before withdrawing any winnings. It's a risk-free way to experience the site and potentially win real money.