Rich snippets are exhibited while in the search engine results, when structured information is embedded during the HTML code of the webpage and is only seen to serps. This structured facts tests tool by schema.org can exam all kinds of schema markups. Merely enter a URL or raw code, as https://addons.prestashop.com/pl/seo-pozycjonowanie-naturalne/31857-automatyczne-google-rich-snippets-json-ld-opengraph-seo.html