Markup is usually conveniently checked through schema markup screening Device. It's going to take a while for rich snippets to seem in search engine results, so they is probably not shown immediately. Having said that, product and class rich snippets will surface only after Google indexes the articles. Stage 1: https://addons.prestashop.com/ru/seo-natural-search-engine-optimization/31857--rich-snippets-json-ld-opengraph-seo.html