Coupons are applicable only if coupons are enabled in the WooCommerce setting page. Addonify Floating Cart has the feature to apply and remove those coupons to product items in cart.

Below are some useful plugins settings for coupons:

1. Display Applied Coupons: All the applied coupons will be visible is this option is enabled.
2. Coupon Apply Button Label: This option will let you set the button label to apply the coupons.

When applying coupons, the success message and error messages are also displayed. Already applied coupons can also be removed.