I've been doing link building recently and noticed that Domain Rating (DR) and Traffic seem to be factors that are used to evaluate how valuable certain backlinks are for your website. There is also UR so how much that affects the value of the back link. I'll give you an example:
Some page is backlinking to your web page. DR for the domain is 45 and Organic Traffic is 9,000 monthly visitors but the actual page linking to your page has UR of 9 and traffic is 200 monthly organic visitors.
I've noticed that DR and domain traffic are used generally to evaluate the value of the link but it would more logical to use UR and traffic of actually page to define how valuable the link is.