If you’ve spent any time researching SEO, you’ve probably run into the term “Domain Authority”, usually shortened to DA. Maybe a client asked you why their DA score isn’t going up. Maybe you saw two websites ranking for the same keyword and wondered why one has a DA of 60 and the other has a DA of 15, yet the smaller site still outranks the bigger one.

This guide breaks down what domain authority actually is, how it’s calculated, why it matters (and where it doesn’t), and what you can realistically do to improve it in 2026.

What Is Domain Authority (DA)?

Domain Authority is a search engine ranking score, developed by Moz, that predicts how likely a website is to rank on search engine results pages (SERPs). It’s measured on a scale of 1 to 100, and higher scores are associated with a greater ability to rank.

Here’s the part people often miss: Domain Authority is not a Google ranking factor. Google doesn’t use DA at all, it’s a third-party metric created by Moz to help SEOs and marketers compare the relative strength of different websites. Other tools have their own versions of this same idea, like Ahrefs’ Domain Rating (DR) and Semrush’s Authority Score. They all try to answer the same question in slightly different ways: “How strong is this domain, based on its backlink profile?”

So when someone asks “what is a good domain authority score,” the honest answer is: it depends on what you’re comparing it to, and it’s only one data point among many.

How Is Domain Authority Calculated?

Domain Authority is calculated using a machine-learning model that looks at dozens of factors and compares them against how sites perform in actual Google search results. The biggest inputs are:

• Linking root domains — how many unique websites link to your domain
• Total number of backlinks — including how many come from high-authority sites versus low-quality ones
• Link quality and relevance — a backlink from a respected industry publication counts for more than one from a spammy directory
• MozRank and MozTrust — Moz’s internal metrics for link popularity and trustworthiness

Because DA is a comparative, logarithmic score, it naturally gets harder to move as it gets higher. Going from a DA of 10 to 20 takes far less link-building effort than going from 60 to 70. This is one reason DA can feel like it “plateaus” even when you’re actively building links.

Why Domain Authority Matters (and Why It’s Often Misunderstood)

DA is useful, but it’s frequently misapplied. Here’s a clearer picture of what it’s actually good for.

What DA is genuinely useful for:

• Comparing your site to competitors to gauge relative backlink strength
• Evaluating guest post or link-building opportunities — a quick way to sanity-check a site before pursuing a link
• Tracking your own SEO progress over time as a directional signal, not an absolute one
• Client reporting, since it’s an easy number to explain to non-SEO stakeholders

What DA is NOT:

• Not a Google ranking factor. You can outrank a higher-DA site with better content, stronger relevance, and smarter on-page and technical SEO.
• Not a measure of content quality. A site can have a strong backlink profile and still publish thin, outdated, or unhelpful content.
• Not consistent across tools. A domain might show DA 40 on Moz and DR 55 on Ahrefs — because each tool uses a different formula and different link index.

If you’re relying on DA as your only success metric, you’re missing the bigger picture. Rankings, organic traffic, and conversions matter far more than the number itself.

What Affects Domain Authority?

A number of factors influence how your DA score moves over time:

1. Backlink profile size and quality — more links from relevant, trusted, high-authority domains
2. Link diversity — links from many different domains, not just repeated links from the same few sites
3. Site age and history — older, established domains often (though not always) carry more authority
4. Toxic or spammy backlinks — a large volume of low-quality or spammy links can drag your score down
5. Internal linking structure — a well-organized internal link structure helps distribute authority across your own pages
6. Content that naturally earns links — original research, data studies, and genuinely useful resources tend to attract backlinks organically

How to Improve Domain Authority

There’s no shortcut here — DA moves slowly and rewards consistency. That said, these are the strategies that actually work:

• Earn backlinks from relevant, authoritative sites. Quality over quantity, every time. A single link from a respected publication in your niche beats dozens of low-quality directory links.
• Publish content worth linking to. Original data, well-researched guides, and genuinely helpful resources are what other sites want to reference.
• Clean up your backlink profile. Use a backlink audit tool to identify and disavow toxic or spammy links pointing to your domain.
• Fix broken links and technical SEO issues. Crawl errors, broken internal links, and poor site structure can quietly hold back your authority.
• Strengthen internal linking. Link from your high-authority pages to newer or weaker pages to help spread link equity across the site.
• Be patient. DA updates periodically (not in real time), and meaningful movement usually takes months, not weeks.

Domain Authority vs. Page Authority vs. Domain Rating

These terms get mixed up often, so here’s a quick side-by-side:

Metric	Created By	What It Measures
Domain Authority (DA)	Moz	Overall ranking strength of an entire domain
Page Authority (PA)	Moz	Ranking strength of a single page, not the whole site
Domain Rating (DR)	Ahrefs	Ahrefs’ own version of overall domain backlink strength
Authority Score	Semrush	Semrush’s own version of overall domain strength

They’re all built on similar logic — backlink quantity and quality — but the exact scores will differ between tools because each one indexes the web differently.

Frequently Asked Questions

Is Domain Authority a Google ranking factor?

No. Domain Authority is a third-party metric created by Moz. Google does not use DA, and it has no direct impact on where a page ranks. It’s a helpful comparative tool, not a Google algorithm input.

What is a good Domain Authority score?

It depends on your industry and competitors. As a general guide, DA 1–20 is typical for new sites, 20–40 is common for growing sites, 40–60 is considered solid, and 60+ is strong, usually seen on well-established or large sites. Compare your score to direct competitors rather than judging it in isolation.

Can Domain Authority go down?

Yes. Losing backlinks, having links removed, accumulating spammy or toxic links, or even algorithm updates to Moz’s own scoring model can cause DA to drop, even if you haven’t changed anything on your site.

How often does Domain Authority update?

Moz updates DA scores periodically, generally on a monthly-to-quarterly basis, rather than in real time. This means recent link-building efforts may take a while to reflect in your score.

Does a higher DA guarantee higher rankings?

No. Relevance, content quality, search intent match, and technical SEO all play a bigger direct role in rankings than DA. A lower-DA site with better, more relevant content can and often does outrank a higher-DA competitor.

Final Thoughts

Domain Authority is a useful compass, not a destination. It gives you a quick way to compare your site’s backlink strength against competitors and track progress over time, but it shouldn’t be the only metric guiding your SEO strategy. Focus on earning genuinely relevant backlinks, publishing content that solves real problems, and keeping your technical SEO clean — the DA score tends to follow, not lead. If you want a deeper look at how off-page signals fit into a broader SEO and AEO strategy, check out our post on SEO vs AEO vs GEO: What’s the Difference and Why It Matters in 2026, or explore AI-focused SEO services if you’re building authority for AI-driven search visibility as well.