If you've been watching your Moz Domain Authority (DA) score move slower than a dial-up connection, you're not alone. That three-digit number between 1 and 100 can feel like a stubborn door that won't budge, no matter how much content you publish. The truth is, DA is a side-effect metric—it reflects the quality and relevance of the links pointing to your site.

Moz Domain Authority update frequency: Every 2-4 weeks ·
Average DA of top 10 Google results: 50-70 ·
Moz DA scale: 1 to 100 ·
Number of linking root domains needed for DA 30: Approximately 100-200 ·
Moz DA vs Ahrefs DR correlation: Moderate (r ≈ 0.6)

Quick snapshot

1Confirmed facts
2What's unclear
  • Exact formula for DA is proprietary and not public (Moz (SEO tool provider))
  • Impact of nofollow vs dofollow links on DA not fully documented (Moz (SEO tool provider))
3Timeline signal
  • Moz introduces DA metric (2011) (Moz (SEO tool provider))
  • DA 2.0 with machine learning launched (2019) (Moz (SEO tool provider))
4What's next

Five key facts about Moz Domain Authority, one pattern: the metric rewards link quality and relevance, not arbitrary count chasing.

Label Value
Moz DA update frequency Every 2-4 weeks (Moz (SEO tool provider))
Moz DA scale 1 to 100 (Moz (SEO tool provider))
Average DA of top 10 Google results 50-70
Number of linking root domains for DA 30 Approximately 100-200
Moz DA vs Ahrefs DR correlation Moderate (r ≈ 0.6)
Moz DA creator Moz, Inc. (2010) (Moz (SEO tool provider))
Is DA a Google ranking factor? No, it is a third-party predictive metric (Moz (SEO tool provider))
Primary recommended action to improve DA Earn more high-quality backlinks and avoid spammy links (Moz Blog (official guidance))

How do I increase domain authority?

Get more high-authority links

  • Earn backlinks from .edu, .gov, and established news sites—these carry the strongest signal for Moz's algorithm (Moz Blog (official guidance)).
  • Create original research, data studies, or tools—content formats that naturally attract editorial mentions and citations (TrueRanker (SEO strategy platform)).
  • Guest post on domains with a DA higher than your own, focusing on relevance over volume (SmithDigital (digital marketing agency)).

Get fewer spammy links

Get more traffic-driving links

  • Focus on links that bring referral traffic and brand visibility—these signal relevance to Moz's algorithm (Moz Blog (official guidance)).
  • Build topic clusters with pillar pages and interlinked supporting articles to establish topical authority. Doceo (digital marketing agency) recommends this approach for 2025.
  • Update existing content regularly—fresh, comprehensive guides earn more links over time. SmithDigital (digital marketing agency) emphasizes this in their 2025 guide.
The upshot

A single link from a domain like a major newspaper can correlate with a DA spike, but the real signal is whether that link sends engaged traffic. TrueRanker (SEO strategy platform) notes that tracking referral traffic alongside authority metrics gives the clearest picture of what's working.

Bottom line: The implication: chasing DA as a standalone number is a trap. When you prioritize links that drive real users and brand visibility, DA follows as a byproduct. The catch is that this takes time—DA updates every 2-4 weeks, and meaningful movement on the logarithmic scale requires consistent effort.

How often does Moz update domain authority?

Moz DA update schedule

  • Moz recalculates DA every 2-4 weeks based on fresh link data from its index (Moz (SEO tool provider)).
  • The update is not real-time—changes happen in batches, so expect a lag between link acquisition and score reflection.

What triggers a DA update?

  • DA is recalculated using machine learning models that incorporate new and lost links from Moz's index (Moz (SEO tool provider)).
  • If a high-authority domain drops out of Moz's index, your DA may decline even if your content and Google rankings are unchanged. Moz (SEO tool provider) documents this behavior.
The paradox

You can do everything right—earn a fantastic link from a .edu domain—and still see no DA movement for weeks because the update cycle hasn't run. Patience isn't a virtue here; it's a requirement.

What this means: timing your SEO audits around Moz's update cycle is pointless. Instead, focus on the link acquisition rate itself. Big Drop Inc. (SEO agency) recommends analyzing two years of referring-domain growth for top competitors and targeting a similar monthly pace rather than chasing arbitrary link quotas.

Why is my domain authority not increasing?

Common reasons for stagnant DA

  • Low-quality backlinks from spammy directories or link farms can suppress DA growth. Name.com (domain registrar and hosting provider) warns about this.
  • A lack of new high-authority links—your competitors are earning links while you stand still (Moz Community Q&A (SEO practitioner forum)).
  • Competitors gaining links faster than you can lower your relative DA, even if your own link profile hasn't weakened.

How to diagnose DA stagnation

  • Export your backlink profile from Google Search Console and an authority tool like Ahrefs or Moz, then flag domains with low authority and negligible traffic. YouTube – backlink audit 2025 edition (SEO training) covers this process.
  • Compare your referring-domain growth rate to top competitors over the last 12-24 months.
  • Check if any high-authority links have dropped from Moz's index—verify with the Moz (SEO tool provider) Link Explorer.
The catch

Losing even one high-authority link or having a core domain drop from Moz's link index can cause DA to decline, even if your content quality hasn't changed. Moz (SEO tool provider) warns that DA tracks its own link graph model, not Google's.

The trade-off: you can't control Moz's index. What you can control is the trajectory of new high-quality links. If you've been earning great links for three months and DA hasn't moved, check your competitors—they may simply be earning faster.

Moz Domain Authority Vs. Ahrefs Domain Rating: Decoding the Metrics

How DA and DR are calculated differently

  • Moz DA uses a machine learning model that predicts ranking potential based on link quality, relevance, and numerous other signals (Moz (SEO tool provider)).
  • Ahrefs DR uses a logarithmic scale based purely on the number and quality of referring domains, weighted by their own DR.
  • DA and DR correlate moderately (r ≈ 0.6), meaning they agree on general trends but can diverge significantly for individual sites.

Which metric to prioritize for SEO

  • DA is better for predicting ranking potential in search results; DR is better for measuring raw link profile strength.
  • Both are relative—use them for trend analysis and competitor benchmarking, not absolute comparison. Moz (SEO tool provider) stresses this.
  • For practical SEO, focus on the metric that aligns with your primary toolstack. If you use Moz for keyword research, watch DA. If you use Ahrefs, watch DR.

The gap between these two metrics matters more than either raw score. Here is how they stack up across key dimensions.

Dimension Moz Domain Authority Ahrefs Domain Rating
Underlying model Machine learning on link quality, relevance, and multiple signals Logarithmic scale weighted by referring domain quality
Primary use case Predicting ranking potential in search results Measuring raw link profile strength
Update cadence Every 2-4 weeks Continuous with index refreshes

Three metrics, one core truth: no third-party authority score is a Google ranking factor. The real value lies in tracking your number over time relative to competitors, not comparing across tools. Name.com (domain registrar and hosting provider) lists all three—Moz, Ahrefs, and Semrush—as valid free checkers for initial benchmarking.

Bottom line: The pattern: DA and DR are siblings with different personalities. DA is the moody artist who factors in more variables; DR is the accountant who counts receipts. Both work best when you watch the trendline, not the snapshot.

How to increase DA and DR?

Link building strategies for both metrics

  • Earn links from authoritative, relevant sites—this improves both DA and DR because both metrics reward quality (Shopify (ecommerce platform)).
  • Guest posting on high-DA/DR domains boosts your link profile for both metrics, as long as the placement is editorial and relevant.
  • Digital PR campaigns that land coverage on major news sites can move both scores, especially if the link is dofollow and contextually relevant. Big Drop Inc. (SEO agency) supports this approach.

Content marketing to attract natural links

  • Create original research, surveys, or data-driven content that journalists and bloggers want to cite—these earn links for both DA and DR. TrueRanker (SEO strategy platform) recommends this.
  • Answer common industry questions in depth—content that follows the "They Ask, You Answer" model earns references and links. Doceo (digital marketing agency) endorses this.
  • Build topic clusters: a pillar page on a core topic plus interlinked supporting articles signals topical authority to both Moz and Ahrefs algorithms.

Step-by-step action plan

  1. Audit your current backlink profile using Google Search Console and an authority tool to identify low-quality links for removal or disavowal.
  2. Set a monthly referring-domain growth target by analyzing two years of competitor data and aiming for their average pace.
  3. Create 1-2 data-driven or research-based content assets each quarter designed to attract editorial mentions from authoritative domains.
  4. Run a digital PR or broken-link replacement campaign targeting domains with DA/DR scores higher than your current baseline.
  5. Review your backlink profile quarterly, disavow new spam domains, and repeat the cycle.
What to watch

Outdated tactics like large-scale low-relevance guest posting, directory spam, and comment spam provide little value and can harm both DA and DR. Smart Monkey Marketing (digital marketing agency) warns that these are 2025 red flags.

Bottom line: The implication: the tactics that work for DA also work for DR, because both reward the same fundamental thing—high-quality, relevant links. The difference is that DA's machine learning model may reward editorial relevance more heavily, while DR's logarithmic scale rewards link count from quality domains. Either way, the playbook is the same.

Timeline of Moz Domain Authority

  • : Moz (then SEOmoz) founded.
  • : Moz introduces Domain Authority metric (Moz (SEO tool provider)).
  • : Moz updates DA algorithm to use machine learning, modernizing the underlying model. Moz (SEO tool provider) documents this.
  • : Moz releases DA 2.0 with improved predictive accuracy. Moz (SEO tool provider) confirms this.
  • : Moz's documentation reinforces that DA is not a Google ranking factor and urges focus on quality link earning (Moz Blog (official guidance)).
  • : Multiple agencies publish updated guides emphasizing quality-over-quantity and DA as a secondary metric. SmithDigital (digital marketing agency) is one example.

Clarity check: confirmed vs unclear

Confirmed facts

  • Moz updates DA every 2-4 weeks (Moz (SEO tool provider))
  • DA is a relative metric, not an absolute score. Moz (SEO tool provider) confirms this.
  • High-quality backlinks improve DA (Moz Blog (official guidance))
  • DA is not a Google ranking factor. Moz (SEO tool provider) states this clearly.

What's unclear

  • Exact formula for DA is proprietary and not public. Moz (SEO tool provider) acknowledges this.
  • Impact of specific link types (e.g., nofollow vs dofollow) on DA is not fully documented. Moz (SEO tool provider) notes this gap.
  • Precise thresholds for "toxic" backlinks vary across SEO tools (Ahrefs, Moz, Semrush use different criteria)

Expert perspectives

"The best way to improve Domain Authority is to earn more high-quality backlinks and reduce spammy or manipulative links, rather than targeting the DA score directly."

Moz Blog (official guidance)

"A good backlink in 2025 should come from a high-quality domain relevant to your topic, use natural descriptive anchor text, point to strong content, and add real user value."

Big Drop Inc. (SEO agency)

"High-quality backlinks are one of the most effective levers for boosting Domain Authority. Guest blogging, digital PR, and broken link building remain core tactics."

SmithDigital (digital marketing agency)

"Question-driven content following the 'They Ask, You Answer' model is still the most reliable driver of link-based authority in 2025."

Doceo (digital marketing agency)

The forward stake: Moz Domain Authority will continue to evolve, but the fundamentals won't change. For site owners in competitive markets, the choice is clear: invest in a systematic link quality process—audit, earn, remove, repeat—or watch competitors pull ahead not because their content is better, but because their backlink profile is cleaner and more relevant.

Additional sources

youtube.com

Frequently asked questions

What is a good domain authority score?

A "good" DA depends on your industry and competition. For local businesses, DA 30-40 can be strong. For national or global publishers, DA 60-80 is common. The key is to compare your DA to direct competitors, not to an arbitrary benchmark. Moz (SEO tool provider) advises this approach.

How long does it take to increase domain authority?

DA updates every 2-4 weeks, so you won't see daily changes. Meaningful improvement (e.g., moving from DA 20 to DA 30) typically takes 6-12 months of consistent high-quality link building. The logarithmic scale means each additional point requires more effort. Moz (SEO tool provider) documents the update cadence.

Does domain authority affect Google rankings?

No. Moz DA is a third-party predictive metric—it estimates how likely a domain is to rank, but Google does not use it in its algorithm. There is a correlation between high DA and good Google rankings, but causality runs through shared factors like backlink quality. Moz (SEO tool provider) clarifies this.

Can I buy domain authority?

No. DA is based on the quality and quantity of backlinks in Moz's index, and there is no legitimate way to purchase an improvement. Buying expired domains with high DA often backfires—the link profile may be outdated or spammed, and the domain's history can hurt your site's credibility. Name.com (domain registrar and hosting provider) warns about this.

Is Moz domain authority free to check?

Yes. Moz offers a free Domain Authority Checker on its website that lets you look up DA for any URL without a paid subscription (Moz (SEO tool provider)).

What is the difference between DA and PA?

Domain Authority (DA) measures the predictive ranking strength of an entire domain or subdomain. Page Authority (PA) measures the same for an individual page. Both use similar machine learning models but at different levels. Moz (SEO tool provider) documents both metrics.

How do I check my domain authority on Moz?

Visit Moz's free Domain Authority Checker, enter your domain, and you'll see your DA score along with linking domain counts. The Moz (SEO tool provider) tool is the reference for this metric.

Related reading: Page Authority and Backlinks Guide — two complementary pieces that dive deeper into Moz's ecosystem and link-building fundamentals.