A First Deposit Bonus at UK casinos is an enticing offer designed to attract new players. When you make your initial deposit, the casino typically matches a percentage of that amount, providing extra funds or free spins to enhance your gaming experience. This bonus allows players to explore a wider range of games without risking too much of their own money. However, it's essential to read the terms and conditions, as wagering requirements and game restrictions may apply. Overall, a First Deposit Bonus can be a great way to kickstart your online casino journey in the UK.