A 300% Match Deposit Bonus is an enticing promotional offer often found in online casinos and betting sites. When players make a deposit, the casino matches it by 300%, effectively tripling the initial amount. For example, a $100 deposit would yield an additional $300 in bonus funds, giving players a total of $400 to play with. This generous bonus enhances the gaming experience, allowing for more opportunities to explore various games and increase winning potential. However, players should always check the terms and conditions, as wagering requirements may apply.