Domain Authority Is Not a Google Ranking Factor: What Google Uses

No. Domain authority is not a Google ranking factor. Google does not use Moz’s Domain Authority, Ahrefs’ Domain Rating or any other SEO tool’s score to rank pages. Those scores are estimates that tool companies build from their own link data.

Google does judge sites as well as pages, though. Its own documentation says it uses site-wide signals, and documentation that leaked in 2024 included an internal attribute called siteAuthority. What goes into it, and how much it counts, is not public.

Below is what Google has said on record, what the leak proves and does not, and how Google recognizes who is behind a site. Then I cover what I would work on.

True or false: domain authority is a Google ranking factor

False, if you mean the scores in SEO tools. Domain Authority is Moz’s metric. Rand Fishkin, who created it, describes it as a score “to assess a website’s capability to rank in Google’s search engine.” It is an outside estimate, not something Google reads.

Ahrefs’ Domain Rating works the same way. Ahrefs says DR “shows the strength of a website’s backlink profile compared to the others in our database” (Ahrefs help center). Each score reflects what that company’s crawler has found, not what Google has found.

Google’s own people have said this many times. In 2016, Gary Illyes wrote: “We don’t really have ‘overall domain authority’.” In 2020, John Mueller was blunter: “Just to be clear, Google doesn’t use Domain Authority at all when it comes to Search crawling, indexing, or ranking.” Search Engine Journal has collected these statements, with a link to each.

What Google has said about site-wide signals

Google has never claimed that a site’s overall standing counts for nothing. Its guide to its ranking systems says its systems are “designed to work on the page level”. Then it adds: “Site-wide signals and classifiers are also used and contribute to our understanding of pages.”

The same guide sets a limit. “Having some good site-wide signals does not mean that all content from a site will always rank highly”. Equally, a few weak site-wide signals do not sink every page.

John Mueller described the idea in a 2018 interview at SearchLove London. Asked about a concept like domain authority, he said Google does “have some metrics that are more on a site level”. He added that some of them “might kind of map into similar things.”

His example was a brand-new page. On a well-known site Google trusts, it may be picked up quickly and ranked “a little bit better” at first. On an unknown site, that takes longer. It ties in with how Google decides what to crawl and index first.

Links still feed into this. Google’s How Search Works page names one quality factor: whether “other prominent websites link or refer to the content.” PageRank “continues to be part of our core ranking systems,” says the ranking guide.

Google’s site reputation policy even refers to a host site’s “already-established ranking signals”. So “Google authority” is real in a loose sense. What Google does not do is read your DA or DR.

What is siteAuthority? What the 2024 leak showed

In May 2024, Rand Fishkin of SparkToro and Mike King of iPullRank published write-ups of leaked internal Google documentation for its Content Warehouse API. Copies can still be read on hexdocs, a public documentation site. One attribute was named siteAuthority.

What the documentation says

Very little. Its full description is one line: “site_authority: converted from quality_nsr.SiteAuthority, applied in Qstar.” It sits in a module of “per doc signals that are compressed”.

So a value with this name existed and was “applied in Qstar”, an internal system the documentation does not explain. Nothing says what goes into it, how it is calculated or how much it weighs.

What the people who broke the story said

Mike King wrote that it “turns out Google does indeed have an overall domain authority.” He also wrote: “We do not know specifically how this measure is computed or used in the downstream scoring functions”.

Rand Fishkin was more cautious about the whole leak. He wrote that it does not show “the weight of particular elements in the search ranking algorithm, nor does it prove which elements are used in the ranking systems.” He called it “a strong indication” but “still no guarantee.”

What Google said

Google confirmed the documents were real. Search Engine Journal reported that Google “officially acknowledged” they were authentic. A Google spokesperson sent Search Engine Land this statement:

We would caution against making inaccurate assumptions about Search based on out-of-context, outdated, or incomplete information. We’ve shared extensive information about how Search works and the types of factors that our systems weigh, while also working to protect the integrity of our results from manipulation.

Search Engine Land added that Google “won’t comment on the specific elements in the document”. I have found no on-record explanation of siteAuthority from Google.

How I read it

Both things can be true. Google does not use Moz’s DA, and Google has its own site-level signals. One of them carried the name siteAuthority in this documentation.

A name alone does not prove the value matches DA, comes from links, weighs much or is still in use. Treat any claim that siteAuthority works exactly like Domain Authority as a guess. That includes the earlier version of this page, which said almost exactly that.

Why chasing a DA score is the wrong target

A tool score is not what Google measures, so raising it is not the goal. A tool counts the links its crawler finds. It cannot tell you which of them Google trusts.

When I trained new SEO hires, a common mistake was treating on-page SEO as a one-time job. After that, they thought, the work was just outreach and off-page submissions. A DA target feeds that habit, and teams start collecting links for the number.

Google calls that link spam: “creating links to or from a site primarily for the purpose of manipulating search rankings.” My consulting page lists it under what I won’t do: “Buy links from networks, bulk packages or paid guest posts. They put the site at risk.”

Small sites can win without a big score. As I wrote on the Adtric blog in July 2026: “In classic search, a smaller brand with sharp content and patience could out-rank a bigger name on merit. I have done it for clients many times.”

I still use these tools. I pay for one of Semrush or Ahrefs. For a competitor’s site, I start with a manual review, then often open Semrush, Ahrefs or Screaming Frog. Read the scores carefully:

• Compare like with like. Same tool, same week, sites competing for the same searches.
• Look past the number. Would your customers recognize the sites that link to you?
• Question sudden jumps. Find out which links caused a spike before you celebrate it.

Entity recognition: how Google works out who you are

The second half of the old question is about entities. Google wants to know which real business, person or thing a page is about, not just which words it contains. That idea goes back to the Knowledge Graph.

At its 2012 launch, Amit Singhal wrote that it “understands real-world entities and their relationships to one another: things, not strings.” Google now calls it “our database of billions of facts about people, places, and things” (How Google’s Knowledge Graph works).

You see it in knowledge panels, the information boxes shown for entities in the Knowledge Graph. Google says they “are automatically generated” from “various sources across the web.”

Structured data is one of those sources. Google says it uses structured data partly “to gather information about the web and the world in general” (intro to structured data). Its examples are the people, books or companies in the markup.

Be clear about what this is not. Google’s ranking systems guide does not mention entities, brands or the Knowledge Graph. Google has not said a knowledge panel lifts rankings. The point is to be understood correctly.

That matters most in AI answers. In the same July 2026 post, I wrote: “In AI answers, so far, the field tilts toward brands the machine already recognizes and trusts.” My short version: “The machine cites who it recognizes. And recognition is branding.” My guide to ranking in AI search results goes further.

How to help Google recognize your business or your name

Knowledge panels are generated automatically. Your job is to make the facts about you clear, consistent and easy to confirm. Here is the order I would work in:

1. Use one name everywhere. Same name, logo, address and phone on your site, Business Profile, social profiles and directories. Google’s site name guidance says it reads your home page and references to your site across the web.
2. Add Organization markup to your home or About page. Google says it can help “disambiguate your organization in search results” (Organization structured data). For a one-person brand, use Person markup.
3. List your real profiles in sameAs. Google’s examples are your profile pages on social media or review sites. List only profiles you control and keep current.
4. Mark up authors as people. Google’s article markup guidance says to use the Person type, with a url or sameAs. My E-E-A-T guide covers author bios and About pages.
5. Keep the markup honest. Google’s rules say “Your structured data must be a true representation of the page content.” Check it with the Rich Results Test.
6. For a local business, verify your Google Business Profile. Google defines prominence as “how well-known a business is”, based partly on links to your business and your reviews. It adds: “There’s no way to request or pay for a better local ranking on Google.”
7. Get mentioned by people who are not you. Press, trade associations, partners, event listings and customer reviews. In Decoding The Click, I call authority borrowed trust: “a way to accelerate your journey from unknown entity to credible player.”
8. Claim your knowledge panel if one appears. Google lets the subject or an official representative claim it and suggest changes. Local businesses use Google Business Profile instead.

Build the kind of authority Google does look at

If site-wide signals exist, the whole site matters. After a big drop, Google’s core update guidance says to check if your “site overall (not just individual pages)” is helpful, reliable and people-first.

I learned this early. When I started in SEO, I built a lead-generation website from scratch for a third-party tech support firm. Then a Google update hit it. I studied the pattern across other sites the update had hit.

With my management, I worked out how the site could show the trust, experience and authority Google looks for. Then we put it in place. The site recovered in about three months.

In a June 2026 post, I listed “Brand and named-author authority” among things that had become more valuable in my practice. The work looks like this:

• Improve or merge thin and outdated pages, so the whole site reads as reliable.
• Put named authors on your pages, and show first-hand experience.
• Earn links and mentions with work worth citing: original data, useful guides, real case studies.
• Keep the technical basics clean, so Google can crawl and index every page you want found.

What I changed on this site

I made some of these changes to ujjwalganesh.com in October and November 2026. The site’s Person schema lists my LinkedIn, X, Amazon author page and Goodreads profile as sameAs links. My About page has a dated career timeline and links to the same Amazon, Goodreads and LinkedIn profiles.

Every article now carries a named author box. New site templates went live by 1 November 2026. It is too early to report results, and I will not guess at them.

Where to start

Stop treating DA or DR as a goal, and keep them as rough comparison tools. Then check three things this month:

1. Does your business use one name, logo and set of contact details everywhere?
2. Does your home or About page carry honest Organization or Person markup, with sameAs links?
3. Do customers, the press and your industry mention you?

If you want help, my SEO and AI search consulting runs monthly. You get a plan with the five or six jobs that matter most, and the work done, structured data included. Each month also checks whether ChatGPT, Gemini and Google’s AI Mode cite you.