Update WooCommerce variable product images when a variation attribute is selected, unlike the default WooCommerce behavior of only updating the image when all attributes are selected.
How to restrict coupon by user roles via extending the core functionality of WooCommerce coupons, adding an extra field to restrict the coupon usage with a set list of user roles
Taking you through the basics of registering custom fields on WooCommerce Products, adding custom fields to variable products, adding fields to the bulk edit screen , adding a custom field to quick edit screen, and display with a custom admin column