A Registration No Deposit Bonus is a promotional offer provided by online casinos and betting sites to attract new players. This bonus allows users to create an account and receive a small amount of bonus funds or free spins without needing to make an initial deposit. It serves as an incentive for players to explore the platform and try out games risk-free. However, these bonuses often come with specific terms and conditions, including wagering requirements, which players should review before participating. Overall, it's a great way to experience a site without financial commitment.