Domain Rating (Ahrefs' metric) and Domain Authority (Moz's equivalent) are third-party scores that estimate the strength of a site's backlink profile on a rough, logarithmic 0–100 scale. Neither is a Google ranking factor. Google has never used either metric, and both companies describe their scores as estimates for comparing sites, not measurements Google produces. That distinction matters more than it sounds, because "check the DR" has become shorthand for "check whether a link is good", when the score was only ever meant to estimate one input among many.
Why DR and real traffic can diverge
A domain's backlink profile and its current organic performance can move independently of each other. A few common patterns explain most of the gap:
- Expired domain flips: a domain that built genuine authority in one niche years ago, expired, and was bought to resell links in an unrelated niche. The backlink history (and DR) persists; the current relevance and traffic do not.
- Penalized or decayed sites: a site that lost significant rankings to a manual action or algorithm update can keep a high DR for a while, because DR reflects the existing backlink profile more than current search performance.
- Link-farm patterns: some sites accumulate backlinks purely to inflate DR for resale, without ever building an audience or a ranking footprint to match.
Because DR is logarithmic, the gap in real authority between DR 20 and DR 21 is far smaller than between DR 74 and DR 75. Small differences near the top of the scale represent much larger real gaps than the same difference lower down, so treating DR as a linear "bigger is always better" scale misreads what it shows.
A worked comparison
| Site A | Site B | |
|---|---|---|
| Domain Rating | 62 | 28 |
| Estimated organic traffic | Near zero, declining | Real, steady, on-topic |
| Topical relevance | Unrelated niche (former travel blog) | Directly relevant to your industry |
| Likely value as a placement | Low, despite the higher score | Meaningfully higher, despite the lower score |
Site A is the pattern to watch for: an attractive headline number attached to a site that no longer works as a trusted publication in any topical sense. Site B is the more defensible placement because the underlying signals, real traffic and real relevance, hold up, even though its score looks less impressive on a report.
How this fits into a full vetting process
DR and traffic checks are two inputs among the ten covered in the main link building guide's publisher qualification framework, not a replacement for the rest of it. A site can pass the DR-and-traffic check and still fail on editorial quality, site history or audience fit. Treat it as the first filter, not the only one. It is the same standard applied to every placement delivered througheditorial link building, and the check happens before outreach, not after a client complains.