A First Deposit Bonus in Australia is a promotional offer provided by online casinos and betting sites to attract new players. When users make their initial deposit, they receive a bonus, often in the form of extra funds or free bets, which can enhance their gaming experience. This incentive allows players to explore various games and betting options with added value. However, it's essential to read the terms and conditions, as wagering requirements and restrictions may apply to the bonus before any winnings can be withdrawn.