The Domain Authority or "Domain Authority" (DA), is one of the most important metrics to assess the importance of search engines on a website. When Matt Cutts said they would not update the Page Rank, the reference to know the importance of search engines to a website, the "Domain Authority" or the Domain Authority, in acronym DA, became the metric par excellence in order to evaluate a website. [https://www.cattolica.it/web/jamesruss/home/-/blogs/what-is-domain-authority- https://www.cattolica.it/web/jamesruss/home/-/blogs/what-is-domain-authority-]