Domain Ranking (DR) is actually a proprietary Website positioning metric by Ahrefs. It represents the power of the web site’s backlink profile with a logarithmic scale from 0 to 100, Together with the latter being the strongest. https://docs.google.com/forms/d/1zly0KOzyqYTbg6OivddtFcYcqnIyAkWYmD0xD5gkWUI/viewform?edit_requested=true