A 100% First Deposit Bonus is an enticing offer provided by online casinos and betting platforms to attract new players. When you make your initial deposit, the platform matches it dollar for dollar, effectively doubling your bankroll. For example, if you deposit $100, you receive an additional $100 in bonus funds, giving you a total of $200 to play with. This bonus allows players to explore a wider range of games and increases their chances of winning. However, it's essential to read the terms and conditions, as wagering requirements and restrictions may apply.