From coral website -
Wagering requirements means the amount you will need to bet in order to release your bonus winnings into your Main Cash Balance.
With most bonuses you will not be able to withdraw the bonus itself, the deposit relating to the bonus or the winnings from the bonus until you have completed the wagering requirement.
How do I see how much I have left to wager?
Unfortunately, this is not currently available via our mobile site or app, however this can be viewed on a desktop PC or laptop, as shown below.
To do this, you will firstly need to click on the Cash Balance link at the top of the page.

This will then open the window as displayed below. From this window you can see a full comprehensive breakdown of your Cash Balance, including free bets and bonuses.

For example, if you have a £10 bonus with 50x requirements, you will need to stake a total of £500 for any of your bonus winnings to be transferred to your Main Cash Balance. This will then enable you to withdraw these winnings, should you wish to do so.
Games you play will count towards the wagering requirements of our Casino bonuses. The types of game you play will contribute a different percentage towards the bonus wagering requirement. See below:
For example, if you stake £1 on Slots, £1 will come off your WR (wagering requirement). If you stake £1 on Roulette, 20p will be deducted from your wagering requirement.
If a combination of bets placed in a roulette game covers 67% or more of the board, it will not count towards the bonus wagering requirement.
Please note that players deemed to be adopting a low risk betting strategy to clear wagering will have the bonus and any winnings removed from the account.