A Bet Deposit Bonus is a promotional offer provided by online betting platforms to attract new customers or retain existing ones. When users make their initial deposit, the platform matches a percentage of that amount, giving players extra funds to wager with. This bonus enhances the betting experience by allowing users to explore more betting options without risking their own money. However, it's essential to read the terms and conditions, as these bonuses often come with wagering requirements and restrictions on eligible games.