Domain Authority (DA) is a metric developed to predict how well a website will rank in search engine results. The scale ranges from 1 to 100, with higher values indicating greater "authority" and potentially higher rankings.
DA is calculated based on various factors, including link profiles (number of backlinks, quality of linking sites, etc.). It is a composite score that works with various other metrics like MozRank and MozTrust to evaluate a website's authority relative to other websites.