Domain Authority, often abbreviated as DA, is a search engine ranking score developed by Moz that predicts how likely a website is to rank on search engine results pages (SERPs). The score ranges from one to 100, with higher scores corresponding to a greater likelihood of ranking. Domain Authority is calculated by evaluating multiple factors, including linking root domains and the 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. It is important to note that Domain Authority is not a metric used by Google in determining search rankings and has no effect on the SERPs. Instead, it is a tool used by marketers to assess the potential search engine performance of a website relative to competitors. Domain Authority is often used in conjunction with Page Authority (PA), which is a similar score provided by Moz that predicts the likelihood of a single page to rank well, regardless of its content.