Image Checker Tool - Feature Guide
This tool is used to show any broken images inside your store.
Broken images are those that no longer exist but are referenced somewhere in your content. This can happen if you add images manually inside your content, and then the source image is deleted.
If you see anything on this tool (e.g. pages, products, articles, categories), you can click to edit and fix the broken image.
When you are unsure what images are missing you can look at the front of your store or in the content boxes when you edit.