Structured data is extra on to a site's HTML markup. Search engines like yahoo use structured knowledge to produce rich snippets, which happen to be little items of information that should then seem in search results. Is there any way to indicate to an airline I'm travelling with somebody Despite https://addons.prestashop.com/fr/seo-referencement-naturel/31857-seo-automatique-google-rich-snippets-json-ld-open-graph.html