SEOs love sortable columns. DA, DR and Authority Score make large prospect lists manageable, which is exactly why they are useful.

They become a problem when the score replaces the site review.

Google does not use Ahrefs DR or other third-party domain-authority scores as direct ranking factors. These are vendor metrics designed to help SEOs interpret backlink profiles. Treat them as estimates, not Google’s internal grade.

DR: useful for backlink-profile strength

Ahrefs Domain Rating (DR) measures the relative strength of a website’s backlink profile on a 0–100 logarithmic scale.

Because it is based on the linking graph in Ahrefs’ database, DR is useful for comparing domains, spotting obvious differences in backlink strength and filtering a long prospect list.

What it does not tell you: whether a particular page is relevant, whether the article is good, whether the domain ranks for your topic, or whether the site is overloaded with outbound commercial links.

DA: similar job, different provider

Domain Authority (DA) is another third-party authority-style metric used widely in SEO workflows. The exact calculation differs from DR because it comes from a different data provider and model.

That means DA 50 and DR 50 are not interchangeable values. Avoid creating rules such as ‘DA must equal DR’ or assuming one metric is objectively more correct.

The practical use is the same: compare like with like inside the same metric, then verify the site with other signals.

Authority Score: a broader composite metric

Semrush Authority Score combines link power with estimated organic traffic and natural-profile/spam indicators.

That can be useful when you want one score that reflects more than backlinks alone. But it is still a proprietary metric. A composite score should prompt investigation, not end it.

Referring domains: often more useful than raw backlink count

Ten links from one website and ten links from ten independent websites are not the same profile.

Referring domains tell you how many unique websites link to a domain or page. For campaign tracking, this is often more informative than total backlink count because one site can create many duplicate or sitewide links.

Semrush’s link-building metrics guidance recommends looking at both backlinks and referring domains, with unique referring domains often being the more useful growth signal.

Page-level strength matters

Domain metrics are site-wide estimates. Your backlink comes from a page.

A new article on a strong domain may initially have very little page-level authority. An older, well-linked resource on a smaller domain may be much stronger at the page level.

When tools provide URL-level metrics, use them. At minimum, check whether the page is internally linked, indexed, relevant and likely to attract readers.

Relevance is not a metric, but it should be in your spreadsheet

This is the awkward part: one of the most important link-quality checks does not arrive as a clean number.

Relevance can be assessed at the domain level, category level and page level. You can turn it into a simple internal label if you need scale: High, Medium, Low.

A crude relevance label reviewed by a human is often more useful than adding a fifth authority score.

Organic visibility: useful, but easy to overinterpret

Organic traffic estimates can help identify whether a site has real search visibility. They can also be wrong, especially on small sites, seasonal sites or markets where the tool has limited data.

Use visibility as a supporting signal. Look at whether the site ranks for topics that match what it publishes. A site with modest traffic but clear topical relevance may still be a better link prospect than a high-traffic site in an unrelated niche.

Outbound domains and link density

A site that links to an unusually large number of unrelated commercial domains deserves extra review.

Some tools expose outbound-domain counts. You can also inspect recent content manually. If every article contains several commercial anchors and the topics jump between unrelated industries, the authority score should not stop you from asking questions.

Anchor-text distribution

Anchor text is both a link-level and profile-level signal.

At the individual-link level, it should be descriptive and natural. At the profile level, you want enough variation that the backlink pattern does not look mechanically optimized.

Google’s link best-practices guidance recommends descriptive, reasonably concise and relevant anchor text. That is a better objective than forcing one exact keyword repeatedly.

Spam and risk indicators

Spam scores and toxicity scores are screening tools. They are not court verdicts.

Use them to identify domains that deserve manual review. Then inspect why the score is high: suspicious anchors, network patterns, malware, indexing problems, unnatural outbound links or other issues.

Do not automatically reject every site with a warning, and do not automatically approve every site with a low score.

Link retention: the metric almost nobody tracks

A backlink that remains live for years and a backlink that disappears after 30 days should not be valued the same way.

Track retention. If you buy or build placements regularly, calculate how many are still live after three, six and twelve months. This turns vendor reliability and site stability into something measurable.

A practical metric stack for prospecting

Signal	Use it for	Do not use it for
DR / DA	Fast domain comparison	Proving a specific link is good
Authority Score	Composite quality screening	Replacing manual review
Referring domains	Backlink diversity	Judging relevance
Page-level strength	Assessing the linking page	Judging the whole brand
Organic visibility	Checking real search presence	Assuming exact traffic
Relevance	Deciding whether the link makes sense	Reducing everything to one score
Outbound-link pattern	Spotting link-selling behaviour	Rejecting a site from one article
Anchor distribution	Avoiding over-optimization	Forcing a fixed ratio
Retention	Measuring long-term delivery quality	Predicting rankings

A simple scoring model if you need one

If your team handles hundreds of prospects, use a lightweight internal score rather than pretending one vendor metric is the truth.

·         Relevance: 0–3

·         Content/site quality: 0–3

·         Authority/backlink strength: 0–2

·         Indexability/stability: 0–1

·         Outbound-link behaviour: 0–1

Ten points is enough. The purpose is consistency between reviewers, not mathematical precision.

What actually matters

Metrics are there to reduce the amount of manual work. They are not there to make the decision for you.

If you remember only one rule, use this: compare metrics inside the same tool, then verify the actual website and page. The backlink exists on a page, not inside a spreadsheet cell.

Frequently Asked Questions

Is DR a Google ranking factor?

No. DR is an Ahrefs metric that estimates backlink-profile strength. Google does not use Ahrefs DR as a direct ranking factor.

Is DA better than DR?

Not in a universal sense. They are different proprietary metrics built from different datasets and formulas. Use each consistently within its own tool.

What is the best metric for link building?

There is no single best metric. Relevance, page quality, authority, referring-domain strength, indexability, outbound-link behaviour and anchor context should be considered together.

Should I reject a site because its spam score is high?

Treat spam/toxicity scores as prompts for review. Investigate why the tool flagged the site before making the decision.