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Official statement

John Mueller confirms that metrics such as 'domain authority' are not used by Google for ranking. He encourages focusing on site quality and user experience rather than on these third-party metrics.
13:49
🎥 Source video

Extracted from a Google Search Central video

⏱ 1h01 💬 EN 📅 18/04/2019 ✂ 12 statements
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📅
Official statement from (7 years ago)
TL;DR

Mueller clarifies: Google does not use any third-party metrics like Domain Authority (DA) or Domain Rating (DR) in its ranking algorithm. For an SEO, this means that optimizing for these scores is a misdirected investment — it's better to focus resources and efforts on real signals: content quality, relevant backlinks, user experience. The nuance? These third-party metrics can still serve as relative indicators during competitive audits, without ever becoming goals in themselves.

What you need to understand

What does Mueller's statement really mean?

When Mueller says that Google ignores Domain Authority, he clarifies a point often misunderstood: these scores (Moz's DA, Ahrefs' DR, Majestic's Trust Flow) are third-party constructs, calculated by external tools based on their own crawls and algorithms. Google has no technical or strategic reason to integrate these metrics into its engine.

The search engine relies on its own internal signals — profile of inbound links, topical authority, user behavior, Core Web Vitals, etc. These signals remain opaque, but they exist independently of any third-party score. Attempting to improve your DA for ranking is confusing the map with the territory.

Why does this confusion persist among so many practitioners?

SEO tools have popularized these metrics because they offer a single, easy-to-compare number. A client understands better “our DA increased from 28 to 35” than “we improved the topical relevance of our backlink profile with 12 contextual editorial links.” It’s reassuring, but misleading.

The problem? Some agencies still sell

SEO Expert opinion

Is Google's stance consistent with field observations?

Absolutely. We regularly see sites with a DA over 50 stagnate on page 3, while domains with a DA of 20 dominate the top 3 thanks to ultra-targeted content and relevant backlinks. Observed correlations between DA and ranking exist, but they are indirect: sites that earn good backlinks tend to rank AND have a high DA. Reverse causality.

The real issue is that the factors influencing DA (the quantity of backlinks, the profile of referring domains) partially overlap with those that Google values. But Google refines with dozens of other signals — link topic, freshness, engagement, EEAT — that DA does not capture. [To be verified]: no public study has ever demonstrated a direct causal link between improving DA and improving organic ranking, all else being equal.

What are the risks of optimizing for DA instead of Google?

The first risk is to purchase bulk backlinks from PBNs just to increase DA. These links may temporarily boost the Moz score, but if their profile is unnatural (over-optimized anchors, off-topic domains, detectable footprints), Google may ignore them — or even penalize the site. DA rises, ranking stagnates or falls.

The second trap: overlooking user experience and content quality because you're obsessed with a number. I've seen sites with a DA of 45 having an 80% bounce rate and almost empty pages. Result: excellent third-party score, catastrophic organic visibility. Google does not rank domains — it ranks pages, based on their relevance and ability to satisfy search intent.

In what contexts do these third-party metrics still hold value?

In competitive audits, to quickly identify the dominant players in a niche. If five competitors have a DR over 70 and you are at 18, you know you'll need to strengthen your backlink profile. But this is just a warning signal, not a course of action.

Another use case: backlink prospecting. Sorting opportunities by DR or DA allows for prioritizing editorial outreach. A link from a DR 60 domain that is contextually relevant will likely have more impact than a link from a DR 15. Likely — because once again, link topicality and editorial context matter more than the raw score.

Warning: If an agency or provider offers you a “DA improvement package” without mentioning the quality of backlinks, thematic relevance, or on-page optimization, run away. This is not SEO; it’s cosmetic metrics that will not impact your organic positions.

Practical impact and recommendations

What should you do if you've been betting on DA until now?

First step: review your KPIs. If your dashboard shows “monthly DA” as a strategic goal, replace it with metrics that are truly aligned with the business: qualified organic traffic, positions on priority queries, conversion rates from SERPs, backlinks from thematically relevant domains.

Next, audit your backlink profile. If you have accumulated links just for DA (spammy directories, PBN, footer widgets), assess their toxicity and disavow anything clearly unnatural. Focus your future link building efforts on contextual editorial placements, even if the target domains have a modest DA — as long as they are relevant and trusted by their audience.

What mistakes should you avoid in this transition?

Don't throw the baby out with the bathwater: the tools that calculate DA (Moz, Ahrefs, Majestic) remain useful for link profile analysis, spam detection, and competitor benchmarking. What you need to abandon is the obsession with the number as a final goal.

Another common mistake: thinking that since Google doesn't use DA, you should completely ignore domain authority. Google has its own internal authority metrics — it just doesn't use those from Moz or Ahrefs. Working on your domain's overall reputation (through quality backlinks, brand mentions, authoritative content) remains fundamental.

How to verify that your SEO efforts are aligned with the true signals Google cares about?

Start by mapping your positions on strategic queries, month after month. If you publish quality content, acquire relevant backlinks, improve your Core Web Vitals, and your positions progress, you are on the right track — even if your DA has only changed by 2 points in 6 months.

Use Search Console to track the evolution of your impressions, clicks, CTR per query. Cross-reference these data with your backlink profile (new thematic referring domains, natural anchors, editorial context). If DA rises alongside, great — but that’s just a collateral effect, not the cause of success.

  • Replace “monthly DA” with business-aligned KPIs: qualified traffic, top 10 positions, organic conversions
  • Audit the existing backlink profile and disavow toxic links obtained solely for DA
  • Prioritize contextual editorial link building on thematically relevant sites, even with modest DR/DA
  • Measure the impact of SEO actions via Search Console (impressions, clicks, positions) rather than through third-party scores
  • Continue using Moz/Ahrefs/Majestic as analysis tools, without ever making them contractual objectives
  • Educate teams and clients on the distinction between third-party metrics and real Google ranking signals
Concretely, Mueller's statement requires a strategic recalibration: to move away from the dictatorship of the single number (DA/DR) and return to the fundamentals — quality content, relevant backlinks, optimal user experience. These endeavors intersect technical SEO, editorial, and link building, and their orchestration can quickly become complex for an internal team without dedicated expertise. If you want to avoid costly mistakes (deoptimization, penalties, poorly allocated link building budgets), support from a specialized SEO agency will help you prioritize the right levers and measure the real impact on your positions — without getting lost in cosmetic metrics.

❓ Frequently Asked Questions

Le Domain Authority de Moz influence-t-il vraiment le classement Google ?
Non. Google n'utilise aucune métrique tierce comme le DA dans son algorithme de ranking. Ce score est calculé par Moz à partir de ses propres données et ne reflète pas les signaux internes de Google.
Faut-il arrêter complètement de suivre le DA et le DR ?
Non, mais il faut les utiliser comme indicateurs relatifs lors d'audits concurrentiels ou de prospection de backlinks — jamais comme objectifs SEO ou KPI contractuels.
Pourquoi certains sites à DA élevé rankent-ils mal ?
Parce que le DA mesure principalement la quantité et la qualité des backlinks selon Moz, sans tenir compte de la pertinence du contenu, de l'expérience utilisateur, des Core Web Vitals et de dizaines d'autres signaux que Google valorise pour classer une page.
Si Google n'utilise pas le DA, utilise-t-il une métrique d'autorité interne ?
Oui, Google dispose de ses propres métriques internes (dont les détails restent opaques), basées sur le profil de backlinks, l'autorité thématique, le comportement utilisateur et d'autres signaux. Il n'a simplement aucune raison d'utiliser les scores calculés par Moz ou Ahrefs.
Peut-on améliorer son ranking en achetant des backlinks pour booster le DA ?
Non. Acheter des backlinks de masse pour faire grimper le DA risque de créer un profil non naturel que Google ignorera ou pénalisera. Le DA peut monter, mais le ranking stagner ou chuter.
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