A 100% deposit bonus in betting is an enticing offer that doubles your initial deposit, providing extra funds to enhance your wagering experience. For instance, if you deposit $100, the bookmaker matches it with an additional $100, giving you a total of $200 to bet with. This bonus allows bettors to explore more betting options and increase their chances of winning. However, it's essential to read the terms and conditions, as there may be wagering requirements and restrictions on eligible games or sports. Overall, a 100% deposit bonus can significantly boost your betting potential.