In the world of online gaming, a match bonus is when the house or casino, either physical or online, matches the amount of money which you deposit, or are willing to wager. It is especially prevalent in the world of online casinos, and also in sports betting such as football and horses.
A match bonus is typically offered to new customers, though they are sometimes provided to existing members as a promotional tool. Often, a deposit will be matched by a percentage amount. The most common offer is having your deposit matched by 100%, no matter if that amount is 10 dollars or 500 dollars.