Immediately after reading this tutorial, we hope there is a greater knowledge of what hreflang is, why you may need it, and how you can put into practice it.  Rel=canonical really should only show up during the of a document. A canonical tag from the area of a web site https://addons.prestashop.com/es/seo-posicionamiento-buscadores/31857-google-rich-snippets-automatico-json-ld-opengraph-seo.html