The hreflang tag gives your content a global SEO boost. Like canonical tags, hreflang helps to avoid penalties associated with duplicate content across global sites. In addition to having content in multiple languages, you can have content focused on language versions only.By using the rel = â € œalternateâ € hreflang = â € œxâ € link attribute, you can be sure that Google understands the geographic orientation of the respective Web site and provides the appropriate language version or regional URL available to the user. subject. Use of the tool is free.