You’ve seen the number everywhere.
DA 45. DA 60. DA 72.
On SEO Twitter. In guest post pitches. On backlink marketplaces. In every agency report you’ve ever opened. Domain Authority has become the default shorthand for “is this site any good?”
Here’s the problem.
Most people using DA don’t actually understand what it measures.
They think a higher number = better rankings. They think Google uses it. They think DA 50 on one site equals DA 50 on another. They chase it like it’s a leaderboard.
All wrong.
In this guide, you’ll learn exactly what Domain Authority is, how it’s calculated, why Google doesn’t use it (yes, really), and when it’s actually worth paying attention to in 2026.
By the end, you’ll know more about DA than 95% of the SEOs using it every day.
Let’s dig in.
The Short Answer (If You’re in a Hurry)
Domain Authority (DA) is a score from 1–100 created by Moz. It predicts how likely a website is to rank in Google.
Quick facts:
- It’s a Moz metric. Not Google’s. Not an industry standard. Moz built it.
- Google does not use DA. John Mueller has confirmed this publicly more than once.
- It’s a prediction, not a measurement. Moz’s machine learning model guesses what Google might do.
- It’s relative, not absolute. DA 50 today isn’t the same as DA 50 two years ago — the whole scale shifts.
- It’s logarithmic. Going from DA 20 to DA 30 is easy. Going from DA 70 to DA 80 is almost impossibly hard.
Useful? Sometimes. Worth obsessing over? No. We’ll get into exactly when DA matters below.
What Is Domain Authority, Really?
Domain Authority is a Moz-created score that predicts the likelihood of a domain ranking in Google’s search results.
Scale: 1 to 100.
Higher = stronger ranking potential, according to Moz’s model.
Moz launched the metric back in 2004. Since then it’s been updated multiple times, with the biggest overhaul coming in 2019. That update — called DA 2.0 — rewrote the formula. The old DA was mostly about link counts. The new one runs on a machine learning model trained against real Google search results.
Moz’s own definition · “The calculation of a domain’s DA score comes from a machine learning algorithm’s predictions about how often Google is using that domain in its search results.” — Moz
Read that again.
DA is a prediction of how often Google might use your domain. It’s not a Google metric. It’s Moz’s best guess based on what they can observe from outside Google’s algorithm.
Big difference.
How Is DA Actually Calculated?
Moz doesn’t publish the exact formula (same reason Coca-Cola doesn’t publish their recipe).
But here’s what we know goes into the model:
- Linking root domains — the number of unique websites pointing to yours
- Total backlinks — across those referring domains
- MozRank — Moz’s PageRank-style link quality score
- MozTrust — a trust-based signal measuring how close your links are to trusted sources
- Spam Score — Moz’s assessment of how spammy the site looks
- Broader site-quality indicators — content signals, on-page factors, user signals where Moz can measure them
Plus another 35+ signals Moz doesn’t fully disclose. Total factors: over 40.
The machine learning part is important. Moz feeds all these signals into a model. Then they train the model against actual Google SERPs. The model tries to find the combination that best predicts which sites Google actually ranks.
When Moz releases a new DA version, your score can change dramatically overnight — even if nothing about your site has changed.
DA isn’t measuring you. It’s measuring how well Moz thinks it can predict Google’s behaviour, based on what it can see about you.
The logarithmic scale (this is important)
DA runs on a logarithmic scale. That sounds technical but it’s actually simple.
It means:
- Going from DA 10 to DA 20? Easy. A few decent links will do it.
- Going from DA 30 to DA 40? Harder. You’ll need real editorial coverage.
- Going from DA 60 to DA 70? Brutal. Months or years of serious link earning.
- Going from DA 80 to DA 90? You’re probably a household brand at this point.
According to Moz’s own data, only 3 websites in the world have a DA of 100. Only around 80 sites have a DA of 95 or higher. We’re talking YouTube, Facebook, Wikipedia, the top news publishers on Earth.
This matters because people constantly set unrealistic DA targets. “I want to get to DA 70 this year.”
Unless you’re launching the next TechCrunch, probably not happening.
The Most Important Thing About DA (That Almost Nobody Says Clearly)
Google does not use Domain Authority.
Not as a ranking factor. Not as a tiebreaker. Not as anything.
Google’s algorithm has never heard of Moz’s metric. It couldn’t factor it in if it wanted to, because Moz doesn’t share the data with Google.
John Mueller — Google’s Search Advocate — has said this directly on multiple occasions: “Google does not use Domain Authority or any third-party metric in our algorithms.”
Want to confirm this yourself? Check Google’s official ranking systems documentation. You’ll find references to PageRank, E-E-A-T, Helpful Content systems, freshness signals, all kinds of real ranking factors. DA appears zero times.
Even Moz itself confirms this. Go read their own docs. They’ll tell you DA is their predictive model, not a Google signal. They’re transparent about it. The problem is that 90% of the SEO industry talks about DA as though it were.
Why this matters · Every time someone tells you “your DA needs to be higher to rank for this keyword,” they’re confused about cause and effect. DA goes up because you’re doing the things that help you rank. You don’t rank because your DA went up.
So… Why Does DA Even Matter?
Fair question. If Google doesn’t use it, why do SEOs care?
Three legitimate reasons:
1. It’s a quick benchmark against competitors
DA lets you compare domains at a glance. If you’re at DA 35 and your top three competitors are DA 55, 62, and 68 — you know roughly where the gap is.
Is it a precise measurement? No. Does it help you prioritise? Yes.
2. It’s a proxy for link prospecting
When you’re evaluating where to invest outreach time — see our outreach guide for the full process — DA gives you a rough quality filter. A DA 60 publication is probably worth pitching. A DA 12 site probably isn’t.
Keyword: rough. Don’t use DA as your only filter. Pair it with traffic data and topical relevance.
3. It tracks your site’s authority growth
Watching your own DA move over 12–24 months tells you whether your link building is working at a macro level. Combined with a proper backlink audit process and organic traffic data, it becomes a useful health metric.
But only one metric in a dashboard. Never the whole picture.
The DA Vanity Trap
Here’s where most SEOs go wrong.
They obsess over DA.
They make it their main KPI. They chase links purely to raise the number. They celebrate when DA goes up even though rankings didn’t budge. They panic when DA drops even though organic traffic is growing.
DA is a vanity metric unless it’s tied to rankings and revenue.
Think about it this way: you could, in theory, buy enough links from enough DA 60+ sites to drag your DA up 15 points in a quarter. Would your rankings follow? Almost certainly not. Would you have wasted five or six figures in link budget? Absolutely.
The only number that actually matters is whether your target pages are ranking for your target keywords. DA is a directional indicator, not a goal. Ground everything in actual organic performance. The What Is Link Building? guide covers why ranking power ultimately comes from link equity and relevance, not from any single third-party metric.
DA vs DR vs AS: The Metric Wars
DA isn’t the only game in town.
Three main domain-level metrics compete for attention:
| Metric | Created by | What it measures | Best used for |
| Domain Authority (DA) | Moz (since 2004) | Predictive ranking likelihood; 40+ signals via machine learning | Holistic benchmarking; spam-aware evaluation |
| Domain Rating (DR) | Ahrefs | Backlink profile strength only; PageRank-style | Pure link-graph strength; fast-reacting |
| Authority Score (AS) | Semrush | Blended link + organic traffic + spam signals | Overall domain quality incl. traffic |
| Trust Flow (TF) | Majestic | Quality of linking domains weighted by trust | Detecting authority vs manipulation |
All four are third-party estimates. None of them are Google ranking factors. Each measures something slightly different. And none of them — not DA, not DR, not AS, not TF — is interchangeable with the others.
Why DA 50 ≠ DR 50 ≠ AS 50
This trips people up constantly.
The scales aren’t interchangeable. Each tool has its own index, its own crawler, its own calculation.
You can have:
- DA 55 and DR 72 on the same site
- DA 40 and DR 40 that mean completely different things in different niches
- DA going up while DR goes down (or vice versa)
A big DR-over-DA gap is often a warning sign. It can mean the site has a strong-looking backlink graph on paper — but Moz’s spam-aware model doesn’t buy it. This happens a lot with sites that have been artificially inflating DR via expired-domain redirects (a 2026 grey-hat tactic we break down in the niche edits guide).
The 2026 DR inflation problem · Several industry audits this year have documented sites climbing from DR 15 to DR 55 in six months through redirect chain acquisition — with zero matching lift in organic traffic. DA, because it includes a spam layer, is harder to manipulate this way. When you see a big DR/DA gap, dig deeper before trusting either number.
What’s a “Good” Domain Authority Score?
The honest answer: it depends entirely on your niche.
Here’s a rough general guide:
| DA Range | Typical classification | What it looks like |
| 1–10 | New / very weak | Brand new domain, almost no backlinks yet |
| 10–30 | Developing | Small blogs, new businesses, early-stage sites with some links |
| 30–50 | Established | Mature small-to-mid sites, niche authorities |
| 50–70 | Strong | Well-known brands, major blogs, regional publishers |
| 70–85 | High authority | National publishers, major SaaS companies, top-tier niche leaders |
| 85–100 | Elite | Household names — Google, YouTube, Facebook, Wikipedia, NYT |
But here’s the thing. In a low-competition niche — say, specialised UK plumbing supplies — DA 30 might be dominating. In a hyper-competitive niche like credit cards or hosting, you might need DA 75+ just to get into the top ten.
Your target DA isn’t a number. It’s a comparison. Look at who’s ranking for your money keywords. That’s your real benchmark.
How to Actually Increase Your Domain Authority
The good news: everything that increases DA also increases real rankings. There are no DA-specific hacks worth running.
Focus on these five things:
1. Earn quality backlinks (the obvious one, done properly)
This is 80% of DA. Links from high-authority, topically relevant sites will move your score further than any other activity. Priority tactics in 2026:
- digital PR guide — still the highest-rated tactic in the industry.
- HARO guide — fast-response journalist queries.
- guest posting guide — placed editorially on relevant, high-authority publications.
- unlinked brand mentions playbook — converting mentions you already have.
- resource page link building — request inclusion on curated lists.
- broken link building — fix dead links with your content.
- Skyscraper Technique — build better versions of widely-linked content.
For the complete tactical playbook, work through the full 15 link building strategies that work in 2026 guide.
2. Audit and remove toxic backlinks
Moz’s model includes spam signals. Toxic links — from link farms, PBNs, spammy directories — can actively suppress your DA even if they’re not triggering a Google penalty yet.
Run a proper backlink audit process every quarter. Disavow what you can’t remove. Clean profiles grow DA faster than dirty ones.
3. Build content that naturally attracts links
Original research. Data studies. Tools and calculators. Industry surveys.
These earn links while you sleep. They’re also exactly the kind of content Moz’s model rewards as high-quality signal.
One well-researched data study is worth more for your DA than a hundred thin blog posts. Backlinko’s 11.8-million-result ranking factors study earned them thousands of editorial backlinks — that’s what a genuine linkable asset looks like.
4. Get your internal linking and technical SEO right
DA is a domain-level metric. That means all your pages contribute to — and benefit from — your site’s overall authority.
Strong internal linking spreads authority efficiently. Broken links leak it. Deep orphan pages waste it.
Fix these foundations. They don’t sound sexy. They work. For the mechanics of how internal links actually distribute equity, see what are backlinks.
5. Use the right anchor text distribution
Too many exact-match anchors → looks manipulated → Moz’s spam layer flags it. Too many naked URLs → looks low-effort → doesn’t reinforce topic authority.
The full breakdown of natural anchor distributions is in the anchor text guide. Short version: branded anchors should dominate, partial-match should be common, exact-match should be rare.
5 Common DA Mistakes That Waste Your Time
1. Treating DA and DR as equivalent
They aren’t. Different tools, different indexes, different algorithms. A DA 50 and a DR 50 are not the same asset. Always check both, and be suspicious when they diverge significantly.
2. Buying links just to pump DA
2026 Moz models are spam-aware. Paid niche edits on low-quality sites don’t help — they can actively lower your DA by pulling down spam scores. And depending on how they’re acquired, they can get you a manual action from Google, which is a much worse problem than a flat DA.
3. Comparing DA across unrelated niches
DA 40 in insurance is impressive. DA 40 in a travel blog is average. DA 40 in gaming news is below average.
The only meaningful DA comparison is against direct competitors for the same keywords.
4. Panicking over monthly DA fluctuations
Moz updates DA regularly. Some updates shift scores by 3–5 points across huge portions of their index even when nothing has changed on your site.
Ignore small month-to-month movement. Look at the 6-month trend. That’s the signal.
5. Using DA as your only link-quality filter
A DA 60 site with no organic traffic will pass almost no ranking equity. A DA 35 niche site with 20,000 organic visits a month can be genuinely powerful. Pair DA with traffic data, topical relevance, and a manual quality check. The best link building tools in 2026 review covers which tools surface traffic data alongside authority metrics.
Domain Authority FAQ
Does Google use Domain Authority?
No. Google has never used Moz’s DA — or any third-party metric — in its ranking algorithms. John Mueller has stated this on the record multiple times. DA is Moz’s prediction of ranking likelihood, not a signal Google uses.
How often does Moz update DA?
Roughly monthly, with occasional larger algorithmic updates to the DA model itself. Small monthly fluctuations are normal and often meaningless. Significant shifts across Moz’s whole index happen a few times per year and are driven by model changes, not your activity.
Can I check my DA for free?
Yes. Moz’s free tools include the Domain Authority checker and their MozBar browser extension. You can also get DA data via Moz’s Link Explorer on a free tier, though with limited monthly queries. For regular use across large link prospecting lists, you’ll want a paid subscription — covered in our best link building tools in 2026.
What’s more important: DA or organic traffic?
Organic traffic. Every time. DA is a prediction of whether a domain can rank. Organic traffic is proof that it already does. When evaluating a backlink opportunity, traffic is the single highest-signal data point — DA is a supporting metric.
Can you lose Domain Authority?
Yes, and it happens for three main reasons: high-quality referring domains drop your links; Moz’s algorithm updates rebalance scores across its index; or Moz’s spam model flags patterns in your link profile it didn’t flag before. Small dips are normal. Persistent multi-month declines usually mean one of the three is happening.
Is Domain Authority the same as Page Authority?
No. Domain Authority scores the whole domain. Page Authority (PA) scores a specific URL. They move independently — a page’s PA can climb even when your overall DA is flat. For link-building prospects, both matter: DA tells you the site’s overall strength, PA tells you how strong the specific page your link would appear on is.
How long does it take to increase DA?
For a new site starting at DA 1–5, reaching DA 30 usually takes 12–18 months of consistent outreach-led link building. Moving from DA 30 to DA 50 can take another 1–2 years. The logarithmic scale means every subsequent 10-point jump takes longer than the last. There are no shortcuts that work and don’t carry penalty risk.
Should I care about DA in 2026?
Care about it a bit. Don’t obsess. Use it as one of several metrics — alongside traffic, referring domains, anchor text distribution, and topical relevance. Rankings and revenue are the only scores that actually pay your bills.
The Bottom Line
Domain Authority is a useful tool. It’s not a truth.
It’s Moz’s external estimate of your ranking potential — helpful for benchmarking competitors, evaluating link targets, and tracking macro-level site growth.
It is not:
- A Google ranking factor
- The same as DR, AS, or TF
- An absolute measurement
- Worth chasing at the expense of rankings
Rankings pay the bills. DA is a rough speedometer.
Build the kind of site that earns rankings, and DA will follow. Chase DA directly, and you’ll burn time on a number that nobody who pays you actually cares about. Start with the What Is Link Building? fundamentals, work through the tactical 15 link building strategies that work in 2026, and let the vanity metrics sort themselves out.
Now go build something that deserves to rank.
