A Bonus on Deposit is a promotional offer provided by online casinos and betting sites to incentivize new and existing players. When a player makes a deposit, the site matches a percentage of that amount as bonus funds, allowing players to explore more games or place additional bets. This bonus often comes with specific wagering requirements, meaning players must bet a certain amount before they can withdraw any winnings derived from the bonus. It's a great way to enhance the gaming experience, but players should always read the terms and conditions carefully.