Markup is often very easily checked by means of schema markup testing tool. It will require some time for rich snippets to seem in search engine results, so that they is probably not displayed quickly. Nonetheless, product and classification rich snippets will appear only following Google indexes the material. Rich https://addons.prestashop.com/fr/seo-referencement-naturel/31857-seo-automatique-google-rich-snippets-json-ld-open-graph.html