You can also add the canonical URL to the HTTP header of the web site (this section is visible only by Internet browsers) Canonical URLs are employed in order to avoid replicate content and indicate to search engines like yahoo which site may be the "unique" web page. This is https://bookmarkprobe.com/story19035876/the-etiquetas-autom%C3%A1ticas-hreflang-canonical-etiquetas-seo-diaries