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If you've spent any time working on SEO, you've probably come across the term "Domain Authority." It's one of the most commonly referenced metrics in the SEO community, yet it's also one of the most misunderstood. Some treat it as gospel; others dismiss it entirely.
The truth is somewhere in the middle. Domain Authority is a useful indicator — not a ranking factor — and understanding what it actually measures can help you make smarter decisions about your website strategy.
What Is Domain Authority?
Domain Authority (DA) is a search engine ranking score developed by Moz. It predicts how likely a website is to rank in search engine result pages (SERPs). DA scores range from 1 to 100, with higher scores corresponding to a greater likelihood of ranking.
Domain Authority is not a Google ranking factor. Google does not use Moz's DA score in its algorithm. Instead, DA is a third-party metric that aggregates several signals to give you a rough estimate of a website's overall SEO strength.
Think of it like a credit score for websites. Just as a credit score doesn't guarantee loan approval but gives lenders a quick snapshot of your creditworthiness, DA gives you a quick snapshot of a site's competitive strength in search.
How Is Domain Authority Calculated?
Moz calculates Domain Authority using a machine learning model that evaluates multiple factors:
Linking root domains — the total number of unique websites linking to your domain. This is the single most influential factor.
Total number of backlinks — the overall count of individual links pointing to your site.
Link quality and authority — a single backlink from a high-authority site carries significantly more weight than dozens of links from unknown blogs.
MozRank and MozTrust — Moz's proprietary metrics that evaluate link popularity and trustworthiness.
The DA score is calculated on a logarithmic scale. This means it's much easier to grow from 20 to 30 than from 70 to 80.
What Is a Good Domain Authority Score?
The right way to evaluate your DA is relative to your competitors, not against an absolute benchmark.
DA 1–20: New websites with very few backlinks. Perfectly normal for recently launched sites.
DA 21–40: Established small websites and growing blogs.
DA 41–60: Well-established websites with strong backlink profiles.
DA 61–80: Highly authoritative websites — major brands and publications.
DA 81–100: The most authoritative sites on the internet (Google, Wikipedia, Apple).
Pro tip: Use our Domain Authority Checker to check your DA and then check 5–10 of your direct competitors.
Domain Authority vs. Page Authority
Page Authority (PA) predicts how well a specific page will rank, rather than an entire domain. Use DA when comparing websites, and PA when analyzing specific pages.
Check both simultaneously with our DA PA Checker tool.
How to Check Your Domain Authority
Enter your website URL into our free Domain Authority Checker and get your current DA score in seconds. We also recommend checking your Page Authority, Backlink Profile, and Domain Age.
7 Ways to Improve Your Domain Authority
1. Earn Quality Backlinks — Focus on links from reputable, relevant websites through guest posting, original research, and useful tools.
2. Create Link-Worthy Content — Original research, comprehensive guides, free tools, and infographics attract natural backlinks.
3. Fix Technical SEO — Use our HTTP Status Code Checker and Redirect Checker to find issues.
4. Improve Internal Linking — Strong internal linking distributes link equity across your site.
5. Remove Toxic Backlinks — Audit your profile with our Backlink Checker and disavow spammy links.
6. Be Patient — DA improvements take months. Focus on consistent quality.
7. Audit Competitors — Check their DA, analyze their backlinks, and create something better.
Common Misconceptions
"DA directly affects Google rankings" — It doesn't. DA is predictive, not a ranking signal.
"I need DA 50+ to rank" — False. Pages from DA 20–30 sites rank on page one for less competitive terms.
"My DA dropped, so rankings will drop" — Not necessarily. DA fluctuates with Moz updates.
Frequently Asked Questions
How often does Domain Authority update?
Moz updates DA scores approximately once per month.
Can my Domain Authority decrease?
Yes — if you lose backlinks, competitors grow faster, or Moz updates its algorithm.
What is the difference between DA and DR?
DA is Moz's metric, DR is Ahrefs' equivalent. Both measure authority but use different algorithms.
Does social media affect Domain Authority?
Not directly, but social media can increase content visibility which leads to more organic backlinks.
Use our free Domain Authority Checker to check your score now, then explore our Website Tracking Tools for a complete analysis.