The Magento 2 store owners have a lot of difficulties in managing coupons. The first drawback is in the fact that the default setting of Magento 2 does not support the Magento 2 store owners in automatically generating coupon code. Since the codes are meant to be unique and used only once, they have to be generated manually and this takes a lot of time to finish.
Moreover, the default setting of Magento 2 does not support the store admin in import the coupon codes in the backend. This situation causes a lot of inconvenience in managing coupons and can even cause customer loss due to the ineffectiveness and unprofessionalism of your store.