Variation of the webpage must be indexed. Hreflang tags advise the online search engine that many variations of the exact same web page exist but all of them Typically, altering the HTML or HTTP is ok when you'll want to alter several pages as time passes, but this process received’t https://addons.prestashop.com/fr/seo-referencement-naturel/30904-balises-hreflang-automatiques-et-balises-canoniques-seo.html