What Is Domain Authority? What the DA Score Really Means

Domain Authority (DA) is a third-party SEO score created by Moz, measured on a scale of 1 to 100, that predicts how likely a website is to rank in search results. It’s built mainly from the site’s backlink profile — but it is not a Google ranking factor, and Google doesn’t use it at all.

That last part surprises a lot of people. You’ll see DA quoted in SEO proposals, link-building pitches, and website valuations as if Google itself assigned the number. It didn’t. DA is one company’s educated guess about your site’s ranking strength. It’s still useful — you just need to know what it is, what it isn’t, and how to actually move it.

Who Created Domain Authority?

Moz, the SEO software company, created Domain Authority as a way to estimate a site’s ability to rank. The idea was simple: give SEOs a single number that summarizes “how strong is this domain in Google’s eyes,” so you can compare your site against competitors at a glance.

A few things about the score itself:

• It runs from 1 to 100. New websites start at 1.
• The scale is logarithmic. Going from 20 to 30 is much easier than going from 70 to 80 — each step up takes exponentially more effort.
• It’s relative, not absolute. A DA of 35 means nothing on its own; it only matters compared to the sites you’re trying to outrank.
• Moz updates its index and calculation method over time, so scores can shift even when you haven’t changed anything.

Because it’s a prediction model rather than an official metric, two sites with the same DA can perform very differently in real search results. Treat it as a compass, not a GPS.

How Is Domain Authority Calculated?

Moz doesn’t publish the exact formula, but the main ingredients are well known. DA is calculated by a machine-learning model that looks at a site’s link data and finds which patterns correlate with actual rankings. The biggest inputs:

• Linking root domains — how many unique websites link to you. One hundred links from one site count far less than one link each from a hundred sites.
• Quality of those links — a link from a trusted, high-authority site carries far more weight than a link from a brand-new blog nobody reads.
• Spam signals — manipulative link patterns can drag the score down.
• Overall link profile shape — natural diversity in anchor text, link placement, and referring domains scores better than patterns that look manufactured.

Notice what’s missing: your content quality, your site speed, your traffic, and your conversions don’t feed into DA directly. A site can have brilliant content and a low DA simply because few sites link to it yet. That’s a limitation worth remembering — DA measures link-based authority, not overall website quality.

Is Domain Authority a Google Ranking Factor?

No — and this is the most important thing to understand about DA. Google has confirmed more than once that it does not use Moz’s Domain Authority, or any third-party metric, in its ranking systems. Google can’t see your DA score, and it doesn’t care what it is.

What Google does care about is the underlying reality DA tries to measure: real authority signals like high-quality backlinks, brand mentions, and user trust. So DA often correlates with rankings — sites with strong link profiles tend to rank well — but the correlation isn’t causation. Raising your DA number doesn’t cause rankings to improve. Earning the real authority behind the number does.

This matters when someone tries to sell you “DA 50 backlinks” or a service that promises to raise your score. If the tactic raises the number without building genuine authority — like links from link farms or private blog networks — your rankings won’t follow, and you could earn a Google penalty instead.

What Counts as a Good Domain Authority Score?

There’s no universal “good” score, because DA only means something in context. A rough way to read it:

• 1–20: Brand-new or very small sites. Totally normal starting point.
• 20–40: Growing sites with a real backlink profile taking shape. Many successful niche blogs and local businesses live here.
• 40–60: Established sites with serious link equity. Competitive in most niches.
• 60–80: Major publications, big brands, well-known resources.
• 80–100: The giants — household names and institutions. Extremely hard to reach.

But here’s the practical way to use it: check the DA of the sites currently ranking on page one for the keywords you want. If they’re sitting at 25–40 and you’re at 30, you’re in the fight. If they’re at 70+ and you’re at 15, that keyword is probably a long-term project, not a quick win. Compare against your actual competitors, not against some abstract ideal.

Domain Authority vs. Other Authority Scores

Moz isn’t the only company with a 1–100 authority score, and you’ll run into the others constantly:

• Ahrefs Domain Rating (DR) — also 1–100, based purely on the strength of a site’s backlink profile. Tends to weight the authority of linking domains heavily.
• Semrush Authority Score — a 1–100 composite that blends backlinks, organic traffic estimates, and spam signals.
• Moz Page Authority (PA) — Moz’s equivalent score for an individual page rather than the whole domain.

These scores usually point in the same direction but rarely agree on the exact number, because each company crawls a different portion of the web and weighs factors differently. Don’t panic if your DA is 32 and your DR is 41 — that’s normal. Pick one tool, learn its scale, and track your progress in that tool over time. Comparing scores across tools is comparing apples to oranges.

How Long Does It Take to Raise Domain Authority?

Longer than most people hope. Because the scale is logarithmic and the score reflects your entire link profile, meaningful movement usually takes months of consistent work — not days.

A brand-new site might climb from 1 to 20–25 within its first year if it’s publishing good content and earning links steadily. But jumping from 40 to 50 can take just as long, because every point requires significantly more link equity than the last. And scores can stall or dip if competitors earn links faster than you, or if Moz updates its index.

Anyone promising to double your DA in a month is either planning to buy spammy links (which risks a penalty) or doesn’t understand how the metric works. Sustainable DA growth is a byproduct of sustainable SEO: over time, as your real authority grows, the number follows.

How Can You Improve Your Domain Authority?

Since DA is mostly a reflection of your backlink profile, improving it means earning better links — the honest way. There’s no settings page to tweak. Here’s what actually works:

• Create content worth linking to. Original research, useful tools, in-depth guides, and interesting data earn links naturally. This is the foundation everything else builds on.
• Do targeted outreach. Find sites that link to your competitors’ content and show them your better, fresher, or more complete version. Relevance matters more than volume.
• Write guest posts for real publications. One guest post on a respected site in your niche beats fifty on random blogs nobody reads.
• Reclaim unlinked mentions. Search for mentions of your brand that don’t link to you, and politely ask the site owner to add a link.
• Fix broken link opportunities. Find dead pages in your niche with lots of backlinks, create a working replacement, and let the linking sites know.
• Build digital PR. Newsworthy stories, surveys, and expert commentary can earn links from news sites and blogs that rarely link out otherwise.
• Clean up toxic links. If your site has spammy links from past SEO work, Google’s Disavow tool lets you tell Google to ignore them. Use it carefully — disavowing good links hurts you.
• Keep your technical SEO solid. DA won’t measure your site speed or crawlability, but Google does — and the rankings you earn from good technical SEO attract the natural links that raise DA.

What doesn’t work: buying bulk backlinks, joining link schemes, stuffing links in blog comments, or any shortcut that manufactures links instead of earning them. These can inflate third-party scores temporarily while putting your actual Google rankings at risk.

Frequently Asked Questions

What’s the difference between Domain Authority and Page Authority?

Domain Authority scores your entire domain; Page Authority (PA) scores a single page. A strong domain lifts all its pages somewhat, but an individual page still needs its own links and relevance to rank for competitive terms. Think of DA as the reputation of the university and PA as the reputation of one professor.

Can my Domain Authority go down?

Yes. If you lose good backlinks, if competitors gain links faster than you, or if Moz updates its link index or calculation method, your score can drop without you doing anything wrong. Small fluctuations are normal — worry about the long-term trend, not week-to-week wiggles.

Does a high DA guarantee I’ll rank number one?

Not at all. DA is a domain-level prediction, but Google ranks individual pages for specific queries. A DA 60 site can lose to a DA 25 site if the smaller site’s page matches the search intent better, loads faster, or earns the click. Relevance and page-level quality still decide most battles.

Is Moz the only tool with an authority score?

No. Ahrefs has Domain Rating (DR) and Semrush has Authority Score, among others. They measure similar things with different data and formulas, so the numbers won’t match. Pick one tool and track your trend there instead of comparing across platforms.

Should I buy backlinks to raise my DA?

No. Paid links violate Google’s spam policies and can trigger a manual penalty that tanks your real rankings — even if some third-party score temporarily goes up. The score is not the goal; the rankings and traffic behind it are. Earn links instead.

Chasing the DA number is a distraction. Building the real authority behind it — quality content, genuine backlinks, and a technically sound site — is what moves rankings. If you want help with the link-building and technical work that actually drives results, check out our digital marketing services.