This documentation describes which properties are required, advisable, or optional for structured knowledge with Particular meaning to Google Search. Most Search structured knowledge uses schema.org vocabulary, but you should rely upon the Google Look for Central documentation as definitive for Google Look for habits, as an alternative to the schema. https://addons.prestashop.com/it/seo-indicizzazione-naturale/31857-google-rich-snippet-automatico-json-ld-open-graph-seo.html