Hreflang="en-us": the ISO code for that language utilized within the web page, followed by the ISO code to the nation at which that webpage is aimed (the place/area code is not often needed) Canonicals should generally point to the most authoritative Edition of the website page. This is not the https://addons.prestashop.com/it/seo-indicizzazione-naturale/31857-google-rich-snippet-automatico-json-ld-open-graph-seo.html