Moz authority is the collective name for Moz’s suite of proprietary SEO scoring metrics — most notably Domain Authority (DA) and Page Authority (PA) — that predict how well an entire website or a specific page is likely to rank in Google and other search engine results. Scores run on a logarithmic scale from 1 to 100. Whether you manage a single blog or a portfolio of enterprise websites, moz authority gives you a standardized, competitor-comparable benchmark for evaluating link strength and diagnosing gaps in your SEO strategy.
A visual representation of a strong moz authority score and the backlink network signals that drive it.
What Is Moz Authority?
Direct Answer: Moz authority refers to Moz’s proprietary scoring system — primarily Domain Authority and Page Authority — that predicts a website’s or individual page’s likelihood of ranking in search results, scored on a scale of 1 to 100. Higher scores signal a stronger, more diverse backlink profile and greater ranking potential relative to competing sites.
Moz introduced Domain Authority as a way to give SEOs and website owners a single, digestible number that reflects the overall strength of a site’s backlink ecosystem. Rather than manually parsing raw link counts or domain lists, DA distills dozens of link signals — including the number of unique linking root domains, the quality and trustworthiness of those domains, and the internal linking architecture — into one composite score.
Page Authority (PA) mirrors the same methodology but applies it to a single URL instead of the whole domain. This makes PA essential for evaluating whether a specific landing page, blog post, or product page has enough link equity to rank for a competitive keyword.
It is critical to understand that moz authority metrics are third-party scores — Google does not use DA or PA in its ranking algorithm. However, because these scores correlate strongly with the types of signals Google does value (particularly the quality, diversity, and trustworthiness of inbound links), improving your moz authority scores almost always reflects genuine, lasting SEO improvements. For a deeper breakdown of what these scores mean in practice, this guide on understanding domain authority from Rank Authority is an excellent starting point.
Domain Authority vs. Page Authority: Key Differences Explained
Both scores are products of the same underlying machine learning model, but they answer different questions. Understanding when to use each one is fundamental to applying moz authority data effectively in your SEO workflow.
Domain Authority (DA)
Measures the overall ranking strength of an entire domain or subdomain. Best used for competitor benchmarking and tracking long-term link-building momentum.
- Aggregates all page-level signals
- Logarithmic scale — harder to grow at high scores
- Updated approximately monthly
- Best metric for broad competitive analysis
Page Authority (PA)
Measures the ranking strength of a single specific URL. Best used for evaluating whether a target page can compete for specific keywords.
- URL-level measurement only
- Same logarithmic scale as DA
- Useful for content-level SERP audits
- Best for evaluating individual page competitiveness
Pro Tip: When analyzing a competitor’s ranking page, look at both DA and PA. A high-DA domain with a low-PA page may be outranked by a mid-DA domain whose specific page has accumulated strong link equity. This nuance is often missed by SEOs who only track domain-level scores.
Both scores are produced by Moz’s machine learning model, trained against actual Google search results to maximize predictive accuracy. The model is retrained regularly, which is why scores can shift even when you haven’t made changes to your site — a common point of confusion that we address in detail below.
How Is Moz Authority Calculated?
Moz authority scores are produced by a proprietary machine learning algorithm that analyzes Moz’s web index — one of the largest link databases in the SEO industry, containing trillions of crawled links. Understanding what goes into the calculation helps you prioritize the right actions to move your score.
Core Inputs to the Moz Authority Algorithm
-
01
Linking Root Domains
The number of unique domains pointing to your site. One hundred links from one hundred different domains is far more valuable than one thousand links from a single domain. Domain diversity is the single most impactful factor you can influence.
-
02
MozRank
Moz’s internal link popularity metric. MozRank measures how many links a page has and how important those linking pages are — similar conceptually to Google’s original PageRank. Higher MozRank pages passing links to you contribute more authority.
-
03
MozTrust
Measures how close your site is (in link hops) to inherently trusted seed sites — think major universities, government domains, and established news organizations. A link from a highly trusted site transfers trust as well as authority.
-
04
Link Quality and Spam Score
Not all backlinks are equal. A single editorial link from a DA 75+ news outlet can outweigh hundreds of directory or forum links. Moz also calculates a Spam Score for linking domains — sites with many spammy links in your profile can suppress rather than elevate your DA.
-
05
Logarithmic Scale Dynamics
The 1–100 scale is logarithmic, not linear. Climbing from DA 20 to DA 30 requires far less effort than moving from DA 70 to DA 80. This means that at high scores, meaningful improvement demands exceptional link acquisition from already-authoritative sources.
-
06
The Relative Nature of Scoring
DA scores are calculated relative to all other sites in Moz’s index. When Moz recrawls the web and finds that all sites have grown their link profiles, even sites that gained links may see their score hold steady or decline — because the entire competitive landscape has shifted upward.
What Moz Authority Does NOT Include
Understanding the boundaries of the metric is as important as understanding what it measures. Moz authority scores do not factor in:
- On-page content quality — DA reflects link signals, not how well-written or relevant your content is.
- Page speed or Core Web Vitals — Technical performance is not a direct input to DA or PA.
- Social media signals — Social shares, likes, and followers are not counted in the moz authority calculation.
- Keyword rankings or organic traffic — A site can have high DA with low traffic if its content isn’t optimized, and vice versa.
Diverse, high-quality backlinks from multiple root domains are the primary engine behind improving moz authority scores.
What Is a Good Moz Authority Score?
This is one of the most frequently asked questions about moz authority — and the honest answer is that there is no universal “good” score in isolation. What matters is how your score compares to the actual sites ranking for your target keywords. A DA of 35 might be more than enough to dominate local service queries; it won’t be enough to compete with DA 80+ national publications for broad head terms.
Moz Authority Score Benchmarks
New or Low Authority
Typical of recently launched domains or sites with very few backlinks. Can still rank for highly specific, low-competition long-tail terms.
Developing Authority
Competitive for local niches, service-area businesses, and long-tail keyword clusters. A realistic target range for most small to mid-size businesses within 12–24 months.
Moderate Authority
Competitive for mid-difficulty keywords across most industries. Typical of well-established niche blogs, regional news outlets, and growing e-commerce brands.
Strong Authority
Typical of established national brands, major niche publications, and sites with robust, years-long link-building programs. Competitive across a broad range of head terms.
Elite Authority
Reserved for the world’s largest media outlets, government and educational domains, and global technology platforms. Extraordinarily difficult to reach and maintain.
How to Use Benchmarks Correctly: Instead of chasing a specific number, pull the DA scores for the top 10 results for your target keywords using Moz’s Link Explorer or the MozBar Chrome extension. Calculate the average. That average is your real target. Aim to be within 10 points of the median — content quality and on-page relevance can bridge the remaining gap.
How to Improve Your Moz Authority Score: Step-by-Step
Improving moz authority is fundamentally about improving the quality, quantity, and diversity of your backlink profile — supported by a technically sound website. The following seven-step approach covers every lever available to you.
-
Step 1: Audit Your Current Link Profile
Before building new links, understand what you already have. Use Moz Link Explorer to view your total linking root domains, DA distribution of linking sites, anchor text breakdown, and Spam Score profile. Identify which links are adding value and which may be hurting you. Export your full backlink list and flag any links from domains with a Spam Score above 30% for further review.
-
Step 2: Audit and Remove Toxic Links
Spammy, manipulative, or irrelevant backlinks can suppress your moz authority score and create Google penalty risk. For flagged toxic links, first attempt manual outreach to the linking site’s webmaster requesting removal. For links you cannot remove, create and submit a disavow file via Google Search Console. Repeat this audit quarterly — your link profile changes continuously as the web evolves.
-
Step 3: Fix Technical SEO Errors That Dilute Authority
Broken internal links, crawl errors, redirect chains, duplicate content, and poor site architecture can dilute your link equity and prevent authority from flowing correctly through your domain. Crawl your site with a tool like Screaming Frog, fix broken links, consolidate duplicate pages with canonical tags, and ensure your most important pages receive internal links from high-authority pages. For a practical checklist, the resource on common SEO errors and solutions covers the most impactful fixes in detail.
-
Step 4: Create Link-Worthy Content at Scale
Content is the long-term engine of moz authority growth. Publish assets that other sites genuinely want to cite: original industry research and surveys, comprehensive how-to guides, free tools and calculators, visual content like infographics and data charts, and definitive resource pages. These formats accumulate links passively over time — compounding your authority without requiring constant outreach effort.
-
Step 5: Execute Targeted Link Acquisition Campaigns
Passive link earning alone is rarely sufficient for competitive industries. Supplement it with active acquisition: digital PR campaigns that earn editorial coverage, guest contributions on high-DA publications in your niche, resource page link building (finding resource pages that should logically link to your content), broken link building (replacing dead links on authoritative sites with links to your content), and HARO/media query responses that earn journalist citations.
-
Step 6: Diversify Your Link Profile Strategically
Moz’s algorithm rewards diversity across multiple dimensions. Aim for links from a wide variety of root domains, across different industries and geographies, with varied anchor text (branded, generic, and partial-match). A natural link profile contains editorial links, resource page links, directory listings in reputable directories, academic and institutional citations, and brand mentions with and without links. Overconcentration in any single type creates an unnatural signal.
-
Step 7: Track Progress and Benchmark Continuously
Monitor your DA and PA scores monthly using Moz’s tools, but always benchmark them against your actual SERP competitors — not a static goal. Set up tracking for your top 5–10 competitors’ DA scores so you can see whether your relative position is improving. Combine DA tracking with organic traffic data, keyword ranking movement, and new linking root domain growth for a complete picture of authority momentum.
A structured, consistent strategy is the only reliable path to steadily improving your moz authority score over time.
Moz Authority vs. Competing Metrics: How Do They Compare?
Moz isn’t the only tool offering authority scores. Understanding how moz authority compares to alternatives helps you choose the right metric — or combination of metrics — for your workflow.
Key takeaway: No single metric tells the complete story. Experienced SEOs typically cross-reference DA with Ahrefs DR and organic traffic data for a well-rounded view of competitive authority. Moz authority remains the most widely recognized metric in SEO — making it the de facto standard for client reporting and partner communications.
How to Check Your Moz Authority Score
Checking your moz authority score is straightforward. Here are the primary methods available: For a deeper walkthrough, see our Moz Keyword Difficulty Checker: Full Guide (2025).
Moz Link Explorer
Moz’s core tool for checking DA, PA, linking root domains, anchor text, top pages by PA, and Spam Score. Free accounts get limited monthly checks; paid Moz Pro plans unlock full access and bulk checking.
MozBar Chrome Extension
Displays DA and PA overlays directly in Google search results and on any page you visit. Invaluable for quick competitive research without switching tools. Free version available; paid version includes page-level on-page analysis.
Moz Free DA Checker
Moz’s public-facing DA checker allows you to check up to a handful of URLs for free without a Moz account. Useful for quick spot-checks but lacks the depth of Link Explorer.
Moz API
Moz exposes DA and PA data through its API for developers and agencies that need to pull authority scores at scale — useful for bulk reporting, custom dashboards, and automated competitive monitoring systems.
Why Does Moz Authority Score Fluctuate?
One of the most frustrating experiences for site owners is watching their moz authority score drop despite consistently building links. There are five primary reasons scores fluctuate — understanding them turns frustration into informed decision-making.
-
→
Moz Index Recrawls:
When Moz recrawls the web, previously counted links may no longer exist, causing score recalculations across all sites simultaneously. -
→
Algorithm Model Updates:
When Moz retrains its ML model against fresh Google results data, the weighting of different link signals may shift, causing widespread score changes unrelated to your individual actions. -
→
Relative Scoring:
If competitors in your space are earning links faster than you, your relative score declines even if your absolute link count grows. You’re being scored against the entire web, not in isolation. -
→
Lost Backlinks:
Linking pages get deleted, restructured, or their links removed over time. Link decay is a natural process — regularly monitoring and reclaiming lost links is essential for score stability. -
→
New Linking Domain Scores:
If a site that links to you experiences a significant DA drop (perhaps due to a Google penalty), that link contributes less authority to your profile in subsequent index updates.
Common Misconceptions About Moz Authority
Despite its near-universal adoption in the SEO industry, moz authority is frequently misunderstood — even by experienced practitioners. Here are the critical misconceptions to clear up.
Myth: A high DA guarantees first-page rankings.
Reality: DA predicts ranking potential, not outcomes. Content relevance, on-page optimization, topical authority, and user experience signals all play critical roles alongside link authority. A DA 80 site with thin, irrelevant content will be outranked by a DA 45 site with exceptional, well-optimized content for specific queries.
Myth: Your DA should always be increasing.
Reality: DA is relative. If competitors in your niche are building links faster than you, your score may drop even if your absolute link count grows. Score stability in a growing niche is actually a meaningful achievement that goes underappreciated.
Myth: You can buy a higher moz authority score.
Reality: Purchased link schemes may temporarily inflate DA, but they routinely trigger Google penalties, and Moz’s spam detection identifies and discounts manipulative links in subsequent index updates, causing dramatic score crashes. The risk-to-reward ratio is deeply unfavorable.
Myth: DA is what Google uses to rank websites.
Reality: Google has explicitly stated it does not use any third-party metrics, including Moz’s DA, in its ranking algorithm. DA is a useful proxy — but it is Moz’s independent measurement, not Google’s.
Myth: A DA of 50 is “average” or “good enough.”
Reality: There is no universally “good enough” DA score. What’s competitive varies completely by industry, keyword difficulty, and SERP landscape. A DA 50 could be dominant in one niche and completely non-competitive in another.
Moz Authority and Spam Score: The Hidden Suppressor
Alongside DA and PA, Moz calculates a Spam Score for every domain it crawls — a percentage from 0% to 100% indicating how closely a site resembles known spam domains. This metric is often overlooked but critically important: links from high-Spam-Score sites can suppress your moz authority score rather than elevate it.
Spam Score is calculated based on 27 features Moz has identified as common to penalized or low-quality sites — including thin content ratios, excessive exact-match anchor text, suspicious TLD patterns, and abnormal linking behavior. A Spam Score above 30% warrants closer scrutiny; above 60% is a strong indicator of a problematic link source.
Action Item: In Moz Link Explorer, filter your backlink list by Spam Score. Investigate any linking domain with a score above 30%. If the link appears manipulative or irrelevant, add it to your disavow file. Proactive spam link management is one of the most underused moz authority improvement levers available.
Frequently Asked Questions About Moz Authority
Key Takeaways
Moz Authority: The Bottom Line
Moz authority — through Domain Authority and Page Authority — remains the SEO industry’s most recognized and widely applied benchmark for measuring and comparing backlink strength. It is not a Google ranking factor, but it is an exceptionally useful proxy for the health, competitiveness, and growth trajectory of your link profile.
The path to a higher score requires deliberate, sustained effort: earning high-quality links from diverse and authoritative domains, maintaining a technically clean website, building link-worthy content assets, proactively managing toxic links, and benchmarking your score against the actual competitors ranking for your target keywords — not an arbitrary number on a scale.
Authority is earned over months and years — not purchased or manufactured overnight. Treat moz authority as one vital indicator within a complete, data-driven SEO strategy.
