Markup is usually simply checked through schema markup testing tool. It takes some time for rich snippets to look in search engine results, so that they may not be shown straight away. Having said that, product and class rich snippets will appear only after Google indexes the written content. Rich https://addons.prestashop.com/es/seo-posicionamiento-buscadores/31857-google-rich-snippets-automatico-json-ld-opengraph-seo.html