A Sign Up Bonus Bet is an enticing promotional offer provided by online sportsbooks and casinos to attract new customers. Upon creating an account and making an initial deposit, users can receive a bonus bet, which allows them to place a wager without risking their own money. This incentive not only enhances the betting experience but also gives newcomers a chance to explore various games or sports without financial pressure. However, it's essential to read the terms and conditions, as these bonuses often come with specific wagering requirements and expiration dates.