A Free Bet Deposit Bonus is a promotional offer provided by online sportsbooks to attract new customers or retain existing ones. When a player makes a qualifying deposit, they receive a bonus in the form of free bet credits, which can be used to place wagers without risking their own money. This type of bonus allows bettors to explore the platform and try out different betting options while minimizing their financial risk. However, it's essential to read the terms and conditions, as there may be wagering requirements and restrictions on how the bonus can be used.