This documentation describes which Attributes are required, recommended, or optional for structured information with special intending to Google Look for. Most Research structured knowledge makes use of schema.org vocabulary, but it is best to rely on the Google Research Central documentation as definitive for Google Lookup behavior, as an alternative https://addons.prestashop.com/de/seo-suchmaschinenranking-optimization/31857-automatische-google-rich-snippets-json-ld-opengraph-seo.html