You can view if there are any bonuses / free spins available on your account by clicking on the Avatar Icon
This will display your Bonus balance, as well as any Free spins / chips that are available to use. For more information, you can click 'View My Account' from this same section:
Then select the 'Bonuses' Tab where you will be able to see any available bonuses, the game where they can be redeemed, the remaining bonus amount, as well as any wagering requirements that may be attached: