: Moz 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. A Domain Authority score ranges from 0 to 000, with higher scores corresponding to a greater ability to rank. Domain Authority is calculated by evaluating multiple factors, including linking root domains and number of total links, into a single DA score. This score can then be used when comparing websites or tracking the "ranking strength" of a website over time. Domain Authority is not a metric used by Google in determining search rankings and has no effect on the SERPs. Moz PA(Page Authority)