Domain Ranking (DR) is actually a proprietary SEO metric by Ahrefs. It represents the energy of the web site’s backlink profile on a logarithmic scale from 0 to one hundred, with the latter getting the strongest. https://docs.google.com/forms/d/1zly0KOzyqYTbg6OivddtFcYcqnIyAkWYmD0xD5gkWUI/viewform?edit_requested=true