With this bonus you get free casino credits or cash as soon as you register with the casino. You do not even have to deposit money into your account to claim this bonus. The bonus amount offered is not too large and is usually between $10 and $50.
You can use this bonus to play your favorite slots, and also any of the other casino games that it covers. It covers usually all casino games except the ones that do not contribute towards wagering requirements.
One thing to remember: ensure that the game you opt to play is covered by this bonus. Failure to do so will result in you forfeiting all winnings earned with the bonus. The bonus itself may be suspended for you as further penalty for not following the rules.
You are allowed to redeem a portion of your winnings from this bonus. To do so you must have fulfilled all the terms and conditions laid down for the bonus including the wagering requirements and made the minimum deposit that is mandatory in order for you to claim winnings from the bonus.