A deposit bonus is a promotional offer provided by online casinos or betting sites, where players receive extra funds or credits when they make a deposit into their account. Typically expressed as a percentage of the deposited amount, this bonus incentivizes new and existing players to increase their bankroll. For example, a 100% deposit bonus on a $100 deposit would give the player an additional $100 to play with. However, these bonuses often come with specific wagering requirements that must be met before any winnings can be withdrawn.