Markup can be easily checked by using schema markup screening Software. It requires some time for rich snippets to seem in search engine results, so they might not be exhibited right away. However, product and class rich snippets will surface only right after Google indexes the written content. Structured information https://addons.prestashop.com/en/seo-natural-search-engine-optimization/31857-automatic-google-rich-snippets-json-ld-open-graph-seo.html