Do you have multiple variants with multiple images representing each variant? If yes, such a high number of images can make your product page really crowded. This feature helps you to show only product images that are related to the currently selected variant. This way, you can keep your product page organized.
* It is important to update product image tags per our instructions inorder to make this work.
** An additional task might be required if you want to make it work on mobile (swiping through images), depending on the theme.