Domain Authority is a score that predicts how well a website domain will be ranked by a search engine. SEO Gurus Moz are the ones that can be credited with the metric known as Domain Authority. Moz employ a machine learning against Google’s algorithm to best model how search engine results are generated. The score is based on a 100 point scale which is based on three things: Age, Popularity and Size.
Domain Authority is based off data from the Mozscape web index and includes link counts, MozRank and MozTrust scores and dozens of other aspects.
It is difficult to affect Domain Authority directly. The best way to influence this metric is to improve your website’s overall SEO. Focus on your link profile , which influences MozRank and MozTrust, by getting more links from other well-liked pages.
Here are some quick tips to help you steadily improve your domain authority score over time:
Take a look at this interesting article on domain authority written back in 2014. We highly recommend it.