What is Domain Authority?
Domain Authority (DA) is a measurement initially developed by the web analytics and SEO service, Moz. DA compares a domain to its competitors to determine its relevance and chances of appearing in the search results for a particular subject.
More About Domain Authority
DA represents the credibility of ideas on a website. In other words, it’s all about reputation. DA shows how trustworthy a site’s material is compared to similar sites’ content.
While Moz created the concept of DA, it’s not the only service that uses it today. Many different SEO tools measure domain authority in some way.