Deposit match is a popular promotion offered by online casinos to attract new players and reward existing ones. When a player makes a deposit, the casino matches a percentage of that amount, effectively boosting the player's bankroll. For example, a 100% deposit match means if you deposit $100, the casino adds another $100, giving you a total of $200 to play with. This bonus often comes with wagering requirements, meaning players must bet a certain amount before they can withdraw any winnings derived from the bonus funds.