Domain Authority is a search engine ranking metric developed by Moz.com that predicts how well a website will rank on search engine result pages (SERPs).

If your Domain Authority is lower than your competition, it is an indication that you may rank lower than them for comparably search engine optimized web pages

Domain Authority (scored from 1 to 100) is calculated by evaluating multiple factors, including linking root domains and the number of total links, into a single Domain Authority score.