A 100% deposit bonus in sports betting is an enticing offer that doubles your initial deposit, giving you extra funds to wager on your favorite sports. For instance, if you deposit $100, the sportsbook matches it with an additional $100, providing a total of $200 to bet with. This bonus enhances your betting experience, allowing you to explore more betting options and increase your chances of winning. However, it's essential to read the terms and conditions, as there may be wagering requirements and restrictions on eligible bets.