Hreflang attribute: what it is and how to use it on multi-language sites without mistakes

The problems with multilingual versions of a site are among the most frequent errors in SEO campaigns, as we said some time ago, and today we want to further deepen this topic and, above all, try to give some indication on the best practices to follow. We are going to then focus on the hreflang tag and the correct implementation of this attribute, which allows you to convey sites and pages for users of different locations, as companies and publishers who operate on an international or otherwise multinational scale