Domain Rating (DR) by Ahrefs is a metric that measures the authority of a website's backlink profile on a scale from 0 to 100. It reflects the overall strength and quality of a domain's backlink profile, considering factors such as the quantity and quality of backlinks pointing to the domain. Websites with higher DR scores are generally considered to be more authoritative and trustworthy in the eyes of search engines, potentially leading to higher rankings in search results and increased organic traffic.