Domain authority doesn't directly affect Google rankings. Moz's score is a third-party comparison metric, not a Google measure of site quality or a Google ranking factor.
That doesn't make it useless. We use it as a comparison tool to compare the strength of a site's backlinks, while rankings, traffic, and leads show whether SEO is working.
First, let's separate the score in your SEO report from the systems Google uses.
Does Domain Authority Influence Google Search?
Google uses its own ranking systems
Google evaluates pages through its own systems, including link analysis, relevance, and other signals. Moz's Domain Authority isn't a Google ranking factor.
Google's Search Central documentation explains how websites become easier to crawl, index, and understand. A third-party authority score doesn't replace those fundamentals.
A website with a strong domain authority score can still struggle with irrelevant content, indexing problems, or pages that don't answer the searcher's question. A smaller website can rank well for a relevant, focused search.
Why higher scores often appear alongside better rankings
Backlinks help explain the connection. Relevant links can support search visibility, and link data can also affect the score.
That creates a relationship, but raising the score itself doesn't cause higher rankings. Both may improve when a website earns useful links.
A higher DA can reflect stronger backlinks. It doesn't tell you whether a particular page deserves to rank for a particular search.
We recommend evaluating the links, content, and actual search results behind the number.
What Domain Authority Measures
Moz estimates DA on a 1-to-100 scale using machine learning and link profile data.

Linking root domains and the logarithmic scale
Moz considers linking root domains, total backlinks, and other link-profile factors. A linking root domain is a unique website that links to yours. Several links from one website still count as one linking root domain.
DA uses a logarithmic scale. Moving from 20 to 30 is generally easier than moving from 80 to 90. Each additional point becomes harder to earn near the top.
Because DA is relative, your score can change when Moz's data or the wider link environment changes.
Page Authority and Spam Score are separate
Page Authority, or PA, estimates the ranking potential of an individual page on a 1-to-100 scale. The page authority score is based on link data, not writing quality.
Neither DA nor PA is a Google ranking factor.
Spam Score is a separate metric. Moz's Spam Score uses 27 features associated with sites that have been penalized. A high DA doesn't cancel out suspicious backlinks, and Spam Score alone doesn't establish a Google penalty.
DA, DR, and Other Authority Scores Compared
Providers use different datasets, definitions, calculations, and update schedules. Their scores aren't interchangeable.
Here's what the main tools measure:
| Provider | Metric | Scale | Main focus |
|---|---|---|---|
| Moz | Domain Authority | 1 to 100 | Relative ranking potential modeled from link data |
| Ahrefs | Domain Rating | 0 to 100 | Relative strength of a domain's backlink profile |
| Semrush | Authority Score | 1 to 100 | Link strength, organic traffic estimates as one input, and spam indicators; traffic estimates aren't Google ranking signals |
| Majestic | Trust Flow and Citation Flow | 0 to 100 | Separate measures emphasizing link quality and quantity |
A DA of 40 and an Ahrefs Domain Rating of 40 don't describe the same benchmark. Moz uses its own machine learning model, so its calculations don't describe how other providers score sites.
Each tool uses its own data and view of a site's link profile. Differences between providers are also examined in research on authority-score reliability.
We recommend using one provider consistently for progress reports. Switching tools can make an unchanged website appear to gain or lose authority.
What Is a Good Domain Authority Score?
There's no universal number a business needs, and Google doesn't require a particular score. A good domain authority score depends on your competition, industry, and website size.

Use broad ranges carefully
Ranges of 40 to 70 on Moz and Semrush's Authority Score, and 60 to 80 on Ahrefs DR, are often described as strong. These are rough, provider-specific references, not equivalent targets or Google ranking requirements.
Smaller and medium-sized websites often fall around 10 to 60. Large domains such as Wikipedia, Amazon, and Facebook commonly occupy the upper ranges, around 80 to 100.
A score below 15 to 20 can point to room to strengthen your link profile. It doesn't mean your website can't rank or attract customers through search.
Build a benchmark against competitors
First, identify three to five competitors with similar services, locations, and business models that appear for your target searches.
Then, record each competitor's score with the same tool. Use the middle score as a starting reference, rather than chasing the highest number.
Next, review which pages earn relevant links and which referring domains point to them. These patterns reveal opportunities a homepage score can't explain.
For local businesses, relevant local link opportunities often matter more than matching a national brand's score.
How to Check Domain Authority for Free
Moz offers free domain analysis with limited information. Enter your root domain to see available authority metrics, backlinks, and linking root domains. Free access and account limits restrict how much detail you can explore.
Semrush also offers limited free access to Authority Score and backlink data. That's a separate metric, not Moz DA.
Record the score, date, referring-domain count, and provider name. Compare them on a consistent schedule.
A new link may not appear in a score right away because providers update link data and calculations on different schedules. Moz uses machine learning to calculate DA, so changes to link data don't necessarily affect the score immediately.
Use Google Search Console to check Google impressions, clicks, queries, and average positions. Use an analytics platform separately to measure organic traffic.
How to Improve Authority Without Chasing the Score
Focus on earning relevant backlinks and improving the pages they support, rather than chasing a domain authority score. These steps help build a healthier website, even when DA changes slowly.
- Publish something worth referencing. Create useful guides, original research, practical tools, or detailed answers based on your expertise. Connect related pages through internal links. Building topical depth in your content gives visitors more complete answers and publishers more reasons to reference your website.
- Reach relevant publishers. Offer useful contributions to respected industry publications, trade organizations, and community websites. Guest posting can introduce your expertise to a relevant audience. Avoid mass-produced articles, paid ranking links, and forced keyword anchors.
- Recover realistic link opportunities. Find mentions of your business that lack a link. Identify broken references where your page offers a suitable replacement. Our broken link building guide explains how to make those requests useful rather than sending generic outreach.
- Support links with sound technical SEO. Repair broken destination pages, use appropriate redirects, and connect important pages through internal links. Improve mobile usability and Core Web Vitals, including loading speed, responsiveness, and visual stability.
Technical improvements don't directly raise a link-based DA score. They help visitors use your website and help search engines access the content you've promoted.
Lastly, measure outcomes. Track new relevant referring domains, referral visits, Search Console performance, and qualified inquiries. A score increase without better visibility or useful traffic offers limited business value.
What to Do When Your Score Drops
Start by checking whether the score change reflects reporting or actual search performance.
A lower domain authority score alone isn't evidence of a Google update, penalty, or ranking decline.
Google Search Central documents Google's ranking systems. A secondary report quotes John Mueller, who has explained that third-party authority metrics don't drive rankings.
Compare the provider's previous report with its current one. Check for lost referring domains, pages returning errors, changed redirects, and differences in the domain or subdomain measured.
Then review Search Console. If clicks and impressions remain stable, the change may reflect the provider's index, model, or comparisons.
If search performance also falls, investigate indexing, content changes, technical problems, and lost relevant links separately.
Don't disavow links just because the score fell or Spam Score increased. Google's disavow tool is for limited cases involving substantial problematic links, not routine score cleanup.
Key Takeaways
- Domain Authority is Moz's estimate, and Google doesn't use the score.
- Compare similar businesses using the same provider over time.
- Relevant links and useful content deserve more attention than a target number.
- Judge SEO progress through visibility, qualified traffic, and business results.
Frequently Asked Questions
Is Domain Authority the same as PageRank?
No. PageRank is Google's link-analysis system. Domain Authority is Moz's third-party estimate.
Google once displayed a public PageRank score from 1 to 10. The public toolbar score was retired in 2016, but Google still uses PageRank internally.
DA, PA, and other authority scores aren't interchangeable with PageRank or a live Google-issued score.
How long does it take to increase domain authority?
There's no fixed timeline. It depends on which links you earn, whether Moz discovers them, and how your profile compares with other domains.
Think in months rather than expecting each new backlink to produce an immediate score increase. We recommend monthly reporting alongside ongoing checks of traffic and leads.
Can a low-DA website outrank a high-DA website?
Yes. Rankings depend on the page, the query, and Google's own signals.
A focused page that answers the searcher's needs can outrank a page on a stronger domain. A domain-level score can't account for every difference in relevance, usefulness, or search intent.
Put Search Performance Ahead of the Score
Domain authority is useful when it helps you compare link profiles and identify realistic opportunities. Its value depends on how you interpret it.
We recommend keeping DA as a supporting benchmark while focusing on relevant links, useful content, and measurable results. Your website's success comes from reaching the right visitors and helping them take the next step.





