A First Deposit Bonus is a promotional offer provided by online casinos and sportsbooks to attract new players. When a user makes their initial deposit, they receive a bonus, often a percentage of the deposit amount, which can be used to place bets or play games. This incentive not only enhances the player's bankroll but also encourages exploration of the platform's offerings. However, it's essential to read the terms and conditions, as these bonuses typically come with wagering requirements that must be met before any winnings can be withdrawn.