An online sports betting deposit bonus is a promotional offer provided by sportsbooks to attract new customers and retain existing ones. Typically, this bonus matches a percentage of the initial deposit, allowing bettors to have extra funds to wager on their favorite sports. For example, a 100% deposit bonus up to $200 means that if you deposit $200, you receive an additional $200 in bonus funds. These bonuses often come with specific wagering requirements, so it's essential for bettors to read the terms and conditions before claiming the offer to maximize their betting experience.