When you have many language or place versions that you mark up with hreflang, then Just about every of those variations should have a canonical tag pointing to alone. It may also allow you to increase the default "x-default" tag for consumers from nations around the world for which the https://addons.prestashop.com/fr/seo-referencement-naturel/31857-seo-automatique-google-rich-snippets-json-ld-open-graph.html