Topical Authority vs Domain Authority: What Actually Matters

Topical authority vs domain authority is a comparison between two different kinds of thing. Domain Authority is a score from 1 to 100 that Moz calculates, mostly from backlink data, to predict how likely a site is to rank. Google doesn’t use it. Topical authority is industry shorthand for how thoroughly and credibly a site covers one subject, and it lines up with things Google has actually documented. My verdict: build topical authority, and use DA or DR only as a rough link benchmark.

That’s the short answer. The longer one matters, because I still see business owners pay for “DA boost” packages while their site has four thin pages on the topic they want to rank for. Picking the wrong target here doesn’t just waste money. It points a whole year of work at a number Google never looks at.

The Mistake Most Comparisons Make

Most articles on this topic line the two up like rival metrics, as if you pick one dashboard over the other. That framing is broken from the start.

Domain Authority is a measurement. Someone outside Google built it to estimate ranking strength from links. Topical authority isn’t a measurement anyone can pull from a tool. It’s a description of an outcome: a site that covers a subject so well that people, other sites and search engines treat it as a go-to source.

So forget “which score is better?” Ask a sharper question. Which one should shape the work you do every week, the pages you write, the links you chase and the budget you spend over the next twelve months? Framed that way, the answer gets much clearer.

What Is Domain Authority, Exactly?

Moz defines Domain Authority as a search engine ranking score it developed, running from 1 to 100, that predicts how likely a website is to rank compared with competitors. Moz calculates it with a machine learning model that leans heavily on backlink data, especially the number and quality of linking root domains. Moz itself says, in plain words, that DA is not a Google ranking factor and has no effect on the search results.

Ahrefs has its own version called Domain Rating (DR). Ahrefs describes DR as the relative strength of a site’s backlink profile on a logarithmic 0 to 100 scale, and calls it purely link-based. Semrush has Authority Score. Different formulas. Same family. All three are built from each vendor’s own crawl of the web, so none of them sees exactly the links Google sees, and none of them was ever meant to be a copy of Google’s scoring.

Two details trip people up:

• These scores are relative. Moz notes that if one giant site gained a huge number of new links, other sites’ scores could drop even though nothing changed on them.
• They measure the whole domain, not a topic. A news site with a DA in the 90s may have almost nothing useful on commercial roof coating, and its score says nothing about that gap.

And Google’s position? John Mueller of Google has said publicly, several times over the years, that Google doesn’t use Domain Authority at all for crawling, indexing or ranking. I take him at his word. Why would Google quietly lean on a formula built by a company that has to guess at Google’s own index from the outside?

Does Google Have Anything Called Topical Authority?

Close, but the name is slightly different, and the scope is narrow. On May 23, 2023, Google published Understanding news topic authority on its Search Central blog. It describes a system called topic authority that helps decide which expert sources are helpful for newsy queries in specialized areas like health, politics and finance.

Google named three prominent signals in that post:

1. How notable a source is for a topic or location. Its example was people turning to The Tennessean for Nashville high school football.
2. Influence and original reporting. How often other publishers cite a source’s original work.
3. Source reputation. A history of high-quality reporting and recommendations from expert bodies.

Here’s where I want to be honest. That system is about news. The phrase “topical authority” for a small business blog or a service site is SEO industry framing, not a Google metric. You won’t find a topical authority score in Search Console.

What Google has documented for all sites is close enough to guide you, though. Its guide to ranking systems says ranking works mainly at the page level, and that site-wide signals and classifiers also contribute. The same guide says PageRank, the link analysis system Google launched with, is still part of its core ranking systems. And Google’s helpful content self-assessment asks two pointed questions: does your site have a primary purpose or focus, and are you producing lots of content on many different topics in hopes that some of it might perform well?

Read those together. The picture is clear. Links still count. Focus counts. Neither comes from a third-party score.

Four Conditions That Decide Which One to Care About

I don’t want to give you a “both matter” answer and leave it there. These are the four things I check before deciding where a client’s effort should go.

1. How much you already cover the topic. If you have fewer than a handful of genuinely useful pages on your core subject, no link profile will carry you far. Coverage comes first.
2. Whether you’re buying or selling links. DA and DR are useful screens when judging another site, less so when judging your own.
3. How competitive the query is. On a hard commercial query, every page on page one may cover the topic well. That’s when real links from relevant sites start separating the winners.
4. How broad your site is. A site that writes about everything spreads its focus thin. A narrow site can go deep faster.

Topical Authority vs Domain Authority, Head to Head

The table shows the split I actually use. DA answers “how strong is this domain’s link profile, roughly?” Topical authority answers “should Google trust this site on this subject?” Only the second one is a question Google is asking.

My Verdict

Topical authority should drive your SEO plan because it describes what Google’s documentation rewards: focus, expertise and useful coverage. However, if you’re evaluating a site to get a link from, or benchmarking a competitor’s link strength, DA or DR is the right quick tool.

In my experience, a small business site with 30 well-built pages on one subject usually beats a scattered site with a bigger link count on the queries that subject covers. I can’t hand you a study that proves that ratio, so treat it as my pattern, not a law.

Where DA and DR earn their place is in link work. When I vet a site for outreach, DR is one filter next to referring domains, real traffic and spam score. Honestly, that filter is there to weed out junk, not to chase a number, and the rest of my vetting lives in how to evaluate backlink quality. A DR 60 site that writes about crypto casinos is worth less to a dental clinic than a DR 25 local health blog.

So chase coverage and relevance first, because that’s the part of the work that compounds, keeps paying off after the invoice is settled and can’t be undone by a vendor recalculating its index. Glance at DA when you’re judging someone else’s site. Never pay anyone to raise your own.

When Does the Answer Flip?

There are real cases where link strength deserves more of your attention than adding new pages.

• If you already cover the topic thoroughly and still sit on page two, the gap is often links and mentions, not content. Look at who ranks above you and how they earned links.
• If your site is brand new, a few genuine links help Google find and crawl your pages at all. Foundation links from real business profiles and directories help here.
• If you’re choosing between two sites to publish on, a large DA gap between them is a fair tiebreaker, as long as both are relevant.
• If you run a big multi-topic publisher, your domain’s overall reputation carries you further, and topical focus becomes a per-section job rather than a site-wide one.

Notice that none of these flips mean “raise your DA.” They mean earn the links that a strong DA would reflect anyway.

How Do You Measure Topical Authority Without a Score?

This is the part most posts skip. Since there’s no official score, you have to read proxies, and I lean on four of them:

• Search Console queries. Filter your performance report to your topic’s pages. If the number of distinct queries showing impressions keeps growing, Google is connecting more of the subject to you.
• Coverage against a topical map. List every subtopic a searcher would expect and mark which ones you’ve answered. My guide on how to create a topical map walks through building that list.
• Entity clarity. Does your content name and explain the things your topic is made of? I explain this in more depth in my post on entity SEO.
• Who links and mentions you. Links from sites in your own field say more about topical trust than a pile of unrelated ones.

If you want the subtopic list built from real search data, that’s the core of our keyword research service, and topical maps are part of it.

What About the Google Leak?

In May 2024, a large set of internal Google API documents leaked, and Google confirmed to The Verge that they were real while warning people not to draw conclusions from incomplete information. The documents list attributes with names like siteFocusScore and siteRadius, which describe how tightly a site sticks to one topic and how far pages drift from it. They also list an attribute named siteAuthority.

I find that interesting, and I think it’s consistent with Google’s public guidance on focus. But the leak doesn’t tell us how or whether those fields are weighted in ranking today. I wouldn’t build a strategy on a field name. I’d build it on what Google has said in public and what I can see in Search Console.

How Does This Change Your Plan?

For most small sites I work with, the plan looks the same. Pick one subject you can own. Cover it completely, with pages that answer real questions and show first-hand experience. Link those pages to each other in a way that makes sense to a reader. Then earn links from relevant sites.

That order matters. A lot. Links pointing at a thin site are mostly wasted. Coverage without any links can stall on competitive queries. Getting both, in that sequence, is what builds the kind of authority people mean when they say it. My post on blog authority covers the trust side for bloggers, and E-E-A-T in SEO covers how Google’s raters think about experience and expertise.

If you run a local business, the same idea works at a smaller scale around your services and service area. I wrote a separate plan for that: topical authority for local SEO.

Not sure which side your site is weak on? A free SEO audit will show whether coverage or links are the bottleneck.

Frequently Asked Questions

Is Domain Authority a Google Ranking Factor?

No. Moz, which created the metric, says Domain Authority is not a Google ranking factor and has no effect on search results. Google’s John Mueller has also said Google doesn’t use it at all. Google does use links, including PageRank, but it doesn’t use Moz’s score or anyone else’s.

Is Domain Rating the Same as Domain Authority?

No, but they’re close cousins. Domain Rating is Ahrefs’ link-based score on a 0 to 100 logarithmic scale, and Domain Authority is Moz’s 1 to 100 score built with machine learning on link data. They use different link indexes and formulas, so the same site often gets different numbers.

Can a Low DA Site Outrank a High DA Site?

Yes, and it happens all the time on specific queries. Google ranks pages, and a focused page that answers the query better can beat a page on a much bigger domain. That’s the most practical argument for topical depth over a higher score.

What Is Google Topic Authority?

It’s a system Google described in May 2023 for surfacing expert and local sources on news queries. It looks at how notable a publication is for a topic or location, how often its original reporting is cited, and its reputation. It’s specific to news, so treat it as a strong hint rather than a rule for every site.

Last updated: September 2026 by Mizanur Rahman