What is Domain Authority (DA)?

Domain Authority (DA) is one of the search engine ranking metrics conceptualized by Moz that gives an idea of how good a website is performing on search engine result pages (SERPs) in terms of keyword rank. A Domain Authority is a kind of score ranges from 1 to 100, with higher scores indicating the greater ability to rank. Domain Authority is calculated by a complex algorithm that evaluates multiple factors, including linking root domains or backlinks and the number of total backlinks, into a single DA score. This score is very useful when comparing websites or tracking the "ranking strength" of a website over time. Domain Authority is a proprietory concept introduced by Moz after Google shutdown the Page Rank (PR) service but of-course it's not a metric used by Google in determining search rankings and has no effect on the SERPs at all. There are dozens of free tools available to check Domain Authority or view a website's DA across the web.