Domain Authority (DA) is a search engine ranking score developed by Moz that predicts how well a website will rank on search engine result pages (SERPs). ... Domain Authority is calculated by evaluating multiple factors, including linking root domains and number of total links, into a single DA score.

Domain Authority (DA) is a metric created by the SEO consulting and research company Moz which measures a website's likelihood to rank on search engines. "Authority" is often used outside of Moz's metric to describe a domain's relative "strength," determined in large part by their backlink portfolio.

Domain Authority is used as a predictive measure for PageRank, Google's proprietary algorithm that plays a major role in determining search engine results. Due to the shroud of secrecy around PageRank, Moz's DA metric is widely considered to be one of the best third party tools for evaluating domain strength.


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