An online betting deposit bonus is a promotional offer provided by sportsbooks and casinos to attract new players and retain existing ones. Typically, it matches a percentage of the player's initial deposit, giving them extra funds to wager with. For example, a 100% deposit bonus up to $200 means that if a player deposits $200, they receive an additional $200 in bonus funds. These bonuses often come with specific wagering requirements, meaning players must bet a certain amount before they can withdraw any winnings. It's a great way to enhance the betting experience and increase potential payouts.