If a casino offers a huge welcome bonus, that doesn't necessarily mean it's worth your time and money. You have to look past the size of the offer and focus more on the attached terms and conditions, most importantly wagering requirements. This multiplier can make or break your chances of cashing in on the bonus.
For example, let's say you take a cash casino bonus with awagering requirement of 30X. This means that you'd have to bet your bonus amount thirty times over before you can withdraw it and the winnings you get from it. You may also deal with requirements when you wager free spins.