The previous guidelines we had were scant and reported little but to provide an image; nevertheless, people employing schema now have to adhere to the new guidelines which can be a lot more descriptive. Just one new guideline is really a no-brainer: "Image URLs should be crawlable and indexable". NOTE: https://prestashop46554.nizarblog.com/32286005/the-best-side-of-sample-json-from-schema