Structured info is added straight to a webpage's HTML markup. Search engines like google and yahoo use structured data to deliver rich snippets, which can be small parts of data that could then appear in search results. Google delivers a free Device identified as Structured Info Markup Helper that assists with building https://addons.prestashop.com/it/seo-indicizzazione-naturale/31857-google-rich-snippet-automatico-json-ld-open-graph-seo.html