This documentation describes which properties are required, suggested, or optional for structured information with Specific meaning to Google Look for. Most Lookup structured data uses schema.org vocabulary, but you ought to depend on the Google Research Central documentation as definitive for Google Lookup conduct, rather then the schema. This extra https://www.presta-addons-modules.com/en/opencart-seo-automatic-google-rich-snippets-json-ld-integration-opengraph-twitter-tags-schemaorg.html