This documentation describes which properties are required, suggested, or optional for structured knowledge with Unique intending to Google Search. Most Search structured info makes use of schema.org vocabulary, but you must count on the Google Look for Central documentation as definitive for Google Search habits, as opposed to the schema. https://addons.prestashop.com/nl/seo-zoekmachineoptimalisatie-vermelding/31857-automatische-google-rich-snippets-json-ld-opengraph-seo.html