What is Ur and Dr in Ahrefs?

Related questions

1. What does a dofollow link look like?
2. What is SEO keyword?
3. What is difference between dofollow and nofollow links?
4. What is SpyFu?
5. What is a keyword list?
6. How do I know what keywords your site ranks for?
7. What is Dr Seo?
8. How much does SpyFu cost?
9. How do I find keywords?
10. What makes a good keyword?

Tags

1. #metrics
2. #while
3. #quality
4. #rates
5. #website
6. #ahrefs
7. #backlinks
8. #going
9. #rating
10. #entire
11. #backlink
12. #quantity
13. #measure
14. #specific
15. #domain
16. #profile