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Official statement

Beyond sheer relevance, factors like HTTPS or speed can influence ranking. When multiple sites are equally relevant, Google may favor the one that provides a better user experience or facilitates access to the content.
25:20
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Extracted from a Google Search Central video

⏱ 33:39 💬 EN 📅 08/12/2020 ✂ 11 statements
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Other statements from this video 10
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  4. 15:17 Le classement Google est-il vraiment une science exacte ou un art subjectif ?
  5. 16:36 Peut-on vraiment mesurer le poids d'un facteur de classement Google ?
  6. 17:55 Faut-il vraiment arrêter de se concentrer sur un seul facteur de ranking pour stabiliser ses positions ?
  7. 19:02 Pourquoi Google refuse-t-il de donner une liste ordonnée de facteurs de classement ?
  8. 22:05 Pourquoi les algorithmes Google évoluent-ils sans cesse et comment s'adapter ?
  9. 23:15 Comment Google valide-t-il vraiment ses changements d'algorithme avant déploiement ?
  10. 24:18 Pourquoi votre classement peut-il baisser même si votre site reste excellent ?
📅
Official statement from (5 years ago)
TL;DR

Google confirms that user experience (HTTPS, speed, accessibility) can differentiate pages of equal relevance. In practical terms, if your content is as good as a competitor's, it's the UX that will make the difference. For an SEO, this means that optimizing Core Web Vitals or migrating to HTTPS is no longer just a comfort measure: it is a direct ranking lever as competition intensifies.

What you need to understand

What does Google mean by "equally relevant"?

Google does not say that UX outweighs content relevance. It specifies that when several pages are equally aligned with user intent, experience factors come into play. Practically, this covers competitive SERPs where five pages cover the same topic with similar depth, close keywords, and comparable authority.

The engine first evaluates semantic relevance, E-E-A-T signals, freshness, and content structure. It's only when these criteria are neck and neck that UX becomes a deciding factor. This does not mean that a slow but comprehensive site will always be outranked by a fast but shallow site — relevance remains the foundation.

What user experience factors does Google consider?

Mueller cites HTTPS and speed as explicit examples. In terms of speed, Core Web Vitals (LCP, CLS, INP since March 2024) are measurable via data from the Chrome User Experience Report. HTTPS is binary: either the SSL certificate is present and valid, or it is not.

Beyond these two examples, we can include mobile compatibility, the absence of intrusive interstitials, clear navigation, and likely indirect behavioral signals (bounce rate, pogosticking). Google remains intentionally vague about the exact weighting, but these factors are all included in the Search Central Guidelines.

Why can't Google rely solely on pure relevance?

Because two pages can be technically as relevant as one another without offering the same user satisfaction. If one takes 8 seconds to load on mobile, displays aggressive pop-ups, and imposes infinite scrolling, the user may leave before even reading the content — even if it's excellent.

Google aims to maximize user satisfaction to retain them. Favoring a fast and secure site, given equal relevance, aligns the engine's interests with those of the user. It's an economic as well as an algorithmic logic: a user frustrated by a slow result will return to Google less frequently.

  • UX does not compensate for weak content — relevance remains the primary filter.
  • HTTPS and Core Web Vitals are measurable and documented; other signals (mobile-friendliness, interstitials) are also measurable.
  • This statement applies to competitive SERPs where multiple players are at the same quality level.
  • Google does not provide a precise threshold for defining "equally relevant" — the interpretation remains vague.
  • Behavioral signals are not explicitly mentioned, but their indirect role is likely.

SEO Expert opinion

Is this statement consistent with real-world observations?

Yes, and it's, in fact, one of the rare cases where Google's discourse aligns with empirical data. Correlation studies (Backlinko, SEMrush) have shown for years that well-ranked sites have lower-than-average loading times, HTTPS rates close to 100% on the first page, and predominantly "Good" Core Web Vitals scores. But correlation is not causation: these sites also invest heavily in content, backlinks, and architecture.

What we observe concretely is that UX alone never boosts a site by 20 positions. However, in queries where five competitors hold positions 3 to 7, moving from "Needs Improvement" to "Good" on Core Web Vitals can move a page from position 4 to 3, even 2. The effect is measurable but always marginal if relevance is not met.

What nuances should be added to this statement?

Mueller speaks of "favoring" a site, not "guaranteeing" its rank. This is a crucial semantic nuance: Google can favor UX, but nothing stops another factor (freshness, domain authority, recent backlinks) from counterbalancing this advantage. The algorithm remains multifactorial — we cannot isolate UX as the single variable.

Second point: Google never defines what it means by "equally relevant". Is it a bandwidth of 5% on an internal relevance score? An absolute threshold? [To be checked] — no public data allows for quantifying this area of indecision. In practice, we can assume it concerns pages that pass all quality filters (Helpful Content, E-E-A-T) and find themselves in tight competition.

When does this rule not apply?

If a site clearly dominates in content depth, author expertise, and backlinks, poor loading times won't cause a drastic drop. We still see exhaustive technical pages, hosted on outdated CMS, maintain top 3 positions despite catastrophic Core Web Vitals — simply because no competitor has produced as comprehensive content.

Similarly, for generic informational queries ("what is SEO"), where dozens of pages are nearly interchangeable, Google may prioritize authoritative sites (Wikipedia, recognized media) regardless of their UX. Domain authority and brand recognition then weigh heavier than a 200 ms gain on LCP.

Attention: Do not underestimate UX just because your content is solid. In highly competitive B2B SERPs, where marketing budgets are large and content is refined, UX often becomes the last exploitable lever to gain a few positions.

Practical impact and recommendations

What concrete steps should be taken to optimize UX for ranking?

Start by auditing your Core Web Vitals using PageSpeed Insights and the Search Console ("Core Web Vitals Report"). Identify critical pages (those generating organic traffic or targeting strategic queries) and prioritize fixes for them. A site with 500 pages does not need to be perfect everywhere: focus on the 20% of pages that bring in 80% of the traffic.

Next, migrate to HTTPS if you haven't already done so. By 2025, this will be a minimal requirement — browsers display aggressive alerts on HTTP sites, degrading the experience even before reaching the page. In terms of speed, reduce image weight (WebP, compression), enable lazy loading, defer non-critical scripts, and consider a CDN if your audience is international.

What mistakes should be avoided when optimizing for UX?

Do not sacrifice content for speed. Removing media, overly simplifying, or breaking a comprehensive article into pagination to gain 100 ms on LCP is counterproductive if it degrades relevance. Google measures UX, but it also measures reading time, interactions, and the completeness of the response.

Another pitfall: focusing solely on laboratory Lighthouse scores. These scores reflect a controlled environment (fast network, powerful CPU). The real-world data (CrUX) are what Google actually uses for ranking. A site can score 95/100 on Lighthouse and be "Poor" in CrUX if real users have slow connections or low-end devices.

How to check if my site offers competitive UX?

Compare your metrics to those of your direct competitors. Open Chrome's developer tools, go to the "Lighthouse" tab, and run an audit on your page and those of the top three organic results for your target query. If your competitors all show an LCP of under 2 seconds and you are at 4 seconds, you know where the problem lies.

Also, use the Search Console to track the evolution of your "Good" vs "Needs Improvement" vs "Poor" URLs. An upward trend in "Good" URLs combined with stagnation or progression in organic positions is a positive indicator. Conversely, if your URLs turn "Poor" and your positions drop in competitive SERPs, UX is likely to blame.

  • Audit the Core Web Vitals of the 20% of pages generating the most organic traffic
  • Migrate to HTTPS and check for certificate errors (mixed content, incomplete HTTP→HTTPS redirects)
  • Optimize image weight (WebP, compression, lazy loading) without sacrificing visual quality
  • Defer non-critical third-party scripts (analytics, chatbots, ads) to reduce blocking time
  • Compare your CrUX metrics with those of the top 3 competitors on your strategic queries
  • Track the monthly evolution of "Good" URLs in the Search Console and correlate with position variations
UX is a differentiating lever in competitive SERPs, not a magic wand. It will never replace mediocre content, but it can shift a position between two pages of comparable quality. Prioritize strategic pages, measure real gains in CrUX, and constantly benchmark against your competitors. These technical optimizations — HTTPS migration, loading time redesign, Core Web Vitals audit — can prove complex to orchestrate alone, especially on larger sites or older CMS. Seeking a specialized SEO agency can provide a thorough audit, a prioritized action plan, and tailored support to avoid costly mistakes.

❓ Frequently Asked Questions

L'UX peut-elle compenser un contenu de qualité inférieure ?
Non. Google évalue d'abord la pertinence sémantique et la qualité du contenu. L'UX ne devient un facteur discriminant que lorsque plusieurs pages sont également pertinentes. Un site rapide mais superficiel perdra face à un concurrent plus lent mais exhaustif.
Les Core Web Vitals sont-ils un facteur de classement direct ?
Oui, officiellement depuis juin 2021 dans le cadre de la Page Experience Update. Mais leur poids reste modéré : ils servent surtout de départage entre pages à pertinence égale, comme le confirme cette déclaration de Mueller.
Faut-il viser un score Lighthouse de 90+ pour bien se classer ?
Pas nécessairement. Google utilise les données CrUX (terrain) pour le classement, pas les scores Lighthouse (laboratoire). Un score Lighthouse de 75 peut correspondre à des métriques CrUX "Good" si vos utilisateurs réels ont de bonnes connexions.
Un site en HTTP peut-il encore se classer en première page ?
C'est de plus en plus rare et déconseillé. HTTPS est un signal de classement léger depuis 2014, mais surtout un prérequis d'UX : les navigateurs affichent des alertes agressives sur les sites HTTP, ce qui dégrade l'expérience avant même l'arrivée sur la page.
Comment savoir si l'UX impacte mon classement sur une requête précise ?
Comparez vos Core Web Vitals (CrUX) à ceux des trois premiers résultats organiques sur cette requête. Si vous êtes "Poor" et qu'ils sont tous "Good", et que vos contenus sont de qualité similaire, l'UX est probablement en cause. Améliorez vos métriques et suivez l'évolution des positions sur 4 à 8 semaines.
🏷 Related Topics
Content HTTPS & Security Web Performance

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Other SEO insights extracted from this same Google Search Central video · duration 33 min · published on 08/12/2020

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