Domain Authority is a metric developed by Moz that predicts how well a website will rank on search engine results pages. It is measured on a scale from 1 to 100, with higher scores indicating a greater likelihood of ranking well. This score is influenced by various factors, including the quality and quantity of backlinks, the age of the domain, and overall site performance. Webmasters and SEO professionals often use Domain Authority to assess their site's strength compared to competitors. While it is not a direct ranking factor used by search engines like Google, it serves as a useful benchmark for improving online visibility and search engine optimization strategies.