SEO Guide
What Does Domain Authority Mean? A Simple Explanation for Busy Marketers
Domain authority (DA) is a score from 1 to 100 that predicts how likely a website is to rank in Google search results compared to other websites. It was created by the SEO company Moz, and it's based mostly on the number and quality of websites that link to you. A higher score suggests stronger ranking ability — but the score comes from Moz, not Google, and Google doesn't use it when deciding rankings.
This guide explains what domain authority means, how it's calculated, why your score might drop, and what's actually worth doing about it. If you'd rather skip the theory, you can check your score and your competitors' backlink gaps automatically with Votrix AI, which pulls authority data from DataForSEO and tracks it for you.
The Basics
What is domain authority, in plain terms?
Think of domain authority as a reputation score for your whole website. Just like a business with more recommendations from trusted sources is easier to trust, a website linked from many respected sites is easier for search engines to see as credible.
Three things make DA different from a ranking you see in Google:
It's a prediction, not a fact.
It estimates your chances of ranking — it doesn't cause rankings (Moz, 2025).
It's comparative.
Your score only means something next to other sites. A DA of 35 might be excellent for a local plumber and weak for a national retailer.
It covers your whole domain.
It's a site-wide score, unlike page authority, which scores one page at a time. We compare the two in our guide to Domain Authority vs Page Authority.
Important: domain authority is not a Google ranking factor. Google has repeatedly confirmed it doesn't use Moz's (or any third-party) authority score in its algorithm. DA is useful for measuring progress and sizing up competitors — not as a goal in itself.
The Math
How is domain authority calculated?
Moz calculates DA with a machine learning model that looks at how often a domain appears in Google search results, using mainly backlink data as inputs (Moz, 2025). The main signals:
- The number of unique websites linking to you (linking root domains)
- The quality and authority of those linking sites
- The overall strength and diversity of your link profile compared with every other site on the web
Because the score is relative, everything moves together. Moz's own example: if Facebook gained a billion new links, other sites' DA scores would drop even if those sites did nothing wrong — Facebook would simply occupy more of the top of the scale (Moz, 2025).
The scale is also not linear. Moving from 20 to 30 is much easier than moving from 70 to 80, because each point higher represents a bigger jump in link strength (Moz, 2025). That's why small businesses commonly sit in the 10–40 range while global brands cluster near the top.
A few related scores you'll see elsewhere:
Ahrefs calls its version Domain Rating (DR); Semrush calls its version Authority Score. They're built on similar logic — backlinks — but the numbers are calculated differently, so the same site can score differently in each tool. See our full comparison: Domain Authority vs Domain Rating.
In Practice
How do you check your domain authority?
You can check DA for free with Moz's Domain Analysis tool or the MozBar browser extension (Moz, 2025). Most major SEO tools also show a version of it.
If you want the score without the manual work, Votrix AI checks your website authority, your backlinks, and the backlink gap between you and your competitors automatically, using data from DataForSEO — so you can see exactly which links your competitors have that you don't. We cover all the free and paid options in How to Check Domain Authority.
Votrix AI
Check your score and your competitors' backlink gaps automatically.
Votrix AI pulls authority data from DataForSEO and tracks it for you — so you can skip the theory and see exactly which links your competitors have that you don't.
Benchmarks
What is a good domain authority score?
There's no universal "good" number — a good DA is simply higher than the sites you're competing against. The practical test: search your target keyword, check the DA of the pages ranking on page one, and aim to reach a similar range. For most local and small-business keywords, that's often in the 20s and 30s; for broad national keywords, it's much higher.
Often in the 20s and 30s
The DA of the pages ranking on page one for most local searches sits in this range.
Much higher
Competing for broad national terms means beating sites with far stronger link profiles.
Our dedicated guide walks through benchmarks by industry and site type: What Is a Good Domain Authority?
Troubleshooting
Why did my domain authority go down?
A drop in DA usually doesn't mean your site got worse. Common causes:
The overall scale shifted.
Because DA is relative, big gains at other sites can push your score down even when your links are unchanged (Moz, 2025).
You lost a few links.
A handful of referring domains expiring or removing links can move a lower-DA site noticeably.
The tool updated its data or its model.
Scores can move when the provider recalculates or refreshes its index.
Your competitors grew faster.
If rival sites earn links quicker than you, your relative score falls even if your absolute link count is rising.
Check whether your traffic and rankings dropped alongside the score. If those are stable, the DA dip is probably just the comparative math — don't panic. The fix in every case is the same steady one: keep earning good links and publishing content worth linking to. We cover the full playbook in How to Increase Domain Authority.
If keeping up with all of that manually sounds like a lot, this is exactly what Votrix AI automates: it monitors your backlinks and authority, identifies the link gap versus competitors, and sends outreach invitations for links and mentions on its own — then tracks whether your rankings and AI visibility improve.
Honest Answer
Is domain authority legit?
Yes and no — it depends on what you expect from it. DA is a legitimate, widely used industry metric: Moz, Ahrefs, and Semrush all publish authority scores, and agencies use them daily to compare sites and track progress. But it's not "legit" as a direct Google input. Any vendor selling you a guaranteed DA number, or a "DA 50+ links" package with no context, is overselling what the metric can do.
Compare and track progress
Do use it to compare yourself against competitors and track your progress over months.
Chase the number itself
Don't use it as a KPI Google rewards, and don't chase the number itself — chasing traffic and rankings is what actually grows the score.
The Playbook
What actually moves your domain authority up
Since DA is driven by links, the levers are familiar:
- Earn links from relevant, credible websites in your niche
- Publish content people naturally want to cite and share
- Fix or replace broken backlinks pointing to your site
- Keep your site technically sound so search engines and AI crawlers can actually read it
Votrix AI handles most of this loop for you: it does keyword research and competitor analysis, writes and publishes articles and pages, rewrites pages that aren't ranking, sends link-building and mention outreach emails automatically, and checks whether Google and AI crawlers can access your site. It also tracks when ChatGPT, Claude, and Google AI Overviews mention your brand — increasingly important as search shifts to AI answers. It's free within the free tier, then pay-as-you-go.
Create content
Keyword research and competitor analysis, then articles and pages worth citing.
Earn links
Link-building and mention outreach emails sent automatically.
Authority grows
Backlinks and authority monitored, with the link gap versus competitors tracked.
Rankings improve
Pages that aren't ranking get rewritten — looping back to more content.
Votrix AI
Track when ChatGPT, Claude, and Google AI Overviews mention your brand.
Search is shifting to AI answers — Votrix AI tracks your AI visibility alongside your rankings, and tells you what to fix next.
FAQ
Domain authority FAQs
What is website authority?
What does SEO stand for?
What does domain mean on a website?
Is a higher domain authority always better?
How long does it take to increase domain authority?
Does domain authority affect rankings directly?
Keep Reading
Related guides
Sources
- Moz — Domain Authority: What is it and how is it calculated — https://moz.com/learn/seo/domain-authority (accessed October 31, 2026)
- Moz — Free Domain Authority Checker — https://moz.com/domain-analysis (accessed October 31, 2026)
- Wix — What is domain authority and how to check it — https://www.wix.com/blog/what-is-domain-authority (accessed October 31, 2026)