The featured image
The Featured Image is the main image for your product. It is displayed in your product loops (i.e., product categories, up sells, related products, etc.) and serves as the focus in the image gallery of your product details page.
Add product galleries
Product galleries display all images attached to a product, with the Featured Image being the primary image.
You can create a product gallery using the same method as adding a featured image, but using the Product Gallery meta box.
Reorder and remove images from product galleries
Images in the product gallery can be re-ordered easily via drag and drop. Simply re-order your images by moving them around.
To remove an image from the product gallery, hover over the image and click on the red “x”.