This module allows you to add any number of coupon codes to a discount. Customers may enter a coupon code on the checkout form to attempt to activate the related discount. If there are other conditions on the discount that prevent it from being applied to the order, the customer will be notified. Otherwise the discount will be applied and the customer will see that the coupon has activated it.
Note: This module is not standalone app. To use this module, you need to get main Stackposts app from here: Stackposts – Social Marketing Tool