Wagering requirements are one of the most important parts in the terms and conditions of every online casino bonus. Wagering requirements tell you how much money you need to play through the site before being able to cash out your winnings. If you apply for a withdrawal before meeting the wagering requirement, you can lose the bonus. Certain betting markets / slot types can be excluded from the wagering requirements, or there can be a hierarchy. For example, slots can count on 100% while live slots are only rated at 50%. You need to read the T&Cs carefully and be perfectly aware of these things.