You could have an mistake in your structured knowledge. Check out the listing of structured information errors plus the Unparsable structured facts report. A site receives marked using this type of notification and it is evaluated as being a much less-than-excellent web page since it has a number of pictures https://followbookmarks.com/story17545302/not-known-details-about-automatyczne-google-rich-snippets-json-ld-opengraph-seo