A $10 deposit bonus is a promotional offer commonly used by online casinos and sportsbooks to attract new players. When users make their first deposit, they receive an additional $10 in bonus funds, allowing them to explore games or place bets without risking their own money. This incentive enhances the gaming experience and provides an opportunity to win real money while minimizing initial investment. However, players should always check the terms and conditions, as wagering requirements and restrictions may apply to the bonus funds.