Domain Ranking (DR) is actually a proprietary SEO metric by Ahrefs. It represents the toughness of the website’s backlink profile on the logarithmic scale from 0 to one hundred, with the latter getting the strongest. https://docs.google.com/forms/d/11SoXZbTlsSwHM_d9GU7eBIXYkq60BiX3MMIumPO59vM/viewform?edit_requested=true