If you want to add a coupon description in WooCommerce, there are two ways that you can do this. One way is to add the description directly in the WordPress editor when you are creating or editing the coupon. The other way is to use the WooCommerce Coupon Description field which is found in the Coupon Data section when you are creating or editing a coupon.
To add a coupon description in the WordPress editor, simply click on the Add Description link which is found above the editor field. This will open up a new window where you can enter your coupon description. Once you have entered your description, click on the Update button and then save your changes.
If you want to add a coupon description using the WooCommerce Coupon Description field, simply scroll down to the Coupon Data section and then enter your description in the field which is found next to the Coupon Description label.
Conclusion:
You can add a coupon description in WooCommerce either by adding it directly in the WordPress editor or by using the WooCommerce Coupon Description field. Whichever method you choose, simply enter your description and then click on the Update button to save your changes.