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Official statement

When it comes to crawl errors, you should only fix those that are relevant for SEO. Sitemaps can be divided to simplify management, but this does not affect Google's processing.
52:56
🎥 Source video

Extracted from a Google Search Central video

⏱ 1h04 💬 EN 📅 27/12/2016 ✂ 19 statements
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Other statements from this video 18
  1. 1:10 Les liens hors-sujet plombent-ils la compréhension de votre site par Google ?
  2. 2:40 Les backlinks dans une autre langue nuisent-ils au référencement de votre site ?
  3. 4:41 Comment Google ajuste-t-il vraiment son algorithme à partir des retours terrain ?
  4. 6:17 L'expérience utilisateur suffit-elle à bien classer un site dans Google ?
  5. 8:38 Le contenu dupliqué : pourquoi Google analyse-t-il bien plus que le simple texte ?
  6. 11:20 Les clics influencent-ils vraiment le classement Google ?
  7. 17:40 Existe-t-il vraiment un facteur de classement dominant dans l'algorithme Google ?
  8. 19:59 Votre version desktop sera-t-elle penalisee si votre mobile est mediocre ?
  9. 21:06 Une page de faible qualité peut-elle vraiment bien se classer sur Google ?
  10. 21:51 L'âge du domaine influence-t-il vraiment le classement sur Google ?
  11. 24:06 Les interstitiels intrusifs plombent-ils vraiment votre référencement mobile ?
  12. 24:06 Le contenu caché en CSS est-il désormais indexé par Google en mobile-first ?
  13. 46:43 Pourquoi une migration de site provoque-t-elle des chutes de trafic SEO imprévisibles ?
  14. 49:17 Les redirections externes vers votre site peuvent-elles vraiment nuire à votre SEO ?
  15. 54:00 La Search Console affiche-t-elle vraiment tous vos résultats organiques ?
  16. 54:42 Le désaveu de liens agit-il vraiment immédiatement après soumission ?
  17. 55:06 AMP booste-t-il vraiment votre classement SEO sur mobile ?
  18. 62:09 Faut-il passer en no-index les pages à faible trafic de votre site ?
📅
Official statement from (9 years ago)
TL;DR

Google states that only crawl errors impacting indexing require correction. Breaking down sitemaps simplifies webmasters' management but does not change algorithmic processing. This means it is essential to prioritize blocking errors and stop wasting time on inconsequential 404s.

What you need to understand

Why does Google differentiate between relevant crawl errors and others?

Google crawls billions of pages daily and naturally encounters technical errors. Not all errors deserve your attention because some have no impact on your visibility. An old deleted PDF generating a 404 from an archived page? Not a problem.

The distinction is based on a simple logic: does this error prevent Google from accessing strategic content? An active product page returning a 500, yes. A redirected old blog URL that still appears in the logs? Probably no.

This approach reflects the maturity of the engine. Google understands that a living site naturally generates temporary or residual errors. The crawler is designed to handle this background noise without penalizing the entire site.

What constitutes a “relevant for SEO” error?

A relevant error blocks access to content you want indexed and ranked. 5xx errors on active pages fall into this category, as do chain redirections that lose PageRank or recurring timeouts on strategic sections.

404s on URLs that never existed or on content deliberately removed are not relevant. Google records them but draws no negative conclusions about your site's quality. Search Console displays them, but that does not mean they should be treated as emergencies.

The nuance lies in editorial intent. If you removed a page because it was outdated, the 404 is legitimate. If that page was generating traffic and you lost it accidentally, it's a relevant error that requires immediate correction.

Does dividing sitemaps really change anything?

Google treats sitemaps as an indicative signal, not as an absolute directive. Whether you have a single file of 50,000 URLs or ten files of 5,000 URLs does not change the indexing decision. The crawler aggregates data and applies its own prioritization rules.

Splitting serves primarily your internal organization. A sitemap for each content type (products, articles, categories) facilitates monitoring and anomaly identification. You can detect more quickly if a specific section is facing crawl issues.

This modular approach also allows you to manage content with different update frequencies separately. Static pages do not need to be recrawled as often as product listings. But for Google, the end result remains the same.

  • Focus your correction efforts on errors that block access to strategic content or generate traffic
  • 404s on non-existent or deliberately removed URLs require no corrective action
  • Dividing sitemaps facilitates monitoring and management but does not modify Google's algorithmic processing
  • Prioritize 5xx errors and timeouts on high-value sections before any other diagnosis
  • Use Search Console as a monitoring tool, not as an exhaustive to-do list

SEO Expert opinion

Does this statement really reflect ground practice?

Google's position generally aligns with observations from hundreds of audited sites. Sites with thousands of 404s in Search Console can rank perfectly well provided their strategic pages are technically sound. The crawler does distinguish background noise from actual blocks.

Let's be honest: this statement also allows for some negligence. A site that accumulates massive 404 errors often reveals deeper structural issues: broken internal linking, poorly managed migrations, automatic generation of ghost URLs. These symptoms deserve investigation even if they do not directly impact indexing.

The true nuance? Google does not say errors are inconsequential, but that not all warrant immediate intervention. A site generating 100 new 404s per week likely has an architectural or CMS problem that needs addressing at the source.

When should you still fix “non-relevant” errors?

Some technical errors do not impact indexing but degrade user experience or waste crawl budget. A sitemap referencing 30% of 404 URLs sends a signal of poor maintenance [To be verified] that Google might interpret as an indicator of overall quality.

Temporary redirects (302) lasting for months should switch to permanent 301s. Google eventually treats them as 301s after a while, but why let this ambiguity persist? Similarly, chains of redirects waste crawl time unnecessarily.

Soft 404 errors — pages that return a 200 but with empty or generic content — are particularly insidious. Google detects them and may decide not to crawl these sections, creating a blind spot you may not see in standard error reports.

Does splitting sitemaps hide a more subtle optimization?

Google states that the structure of the sitemap does not impact processing, but experience shows that certain splitting patterns correlate with faster indexing [To be verified]. A separate product sitemap, updated in real-time, seems to trigger a more responsive recrawl than a monolithic file.

This observation could be explained by the logic of freshness. If Google sees that a specific sitemap changes frequently, it may increase its crawl frequency on those URLs. A global file dilutes this signal within the mass of static pages.

The real limit? Sitemaps remain one signal among others. A site with excellent internal linking and quality backlinks does not need hyper-optimized sitemaps. It's a helpful crutch to assist the crawler, not a miracle solution to force indexing.

Practical impact and recommendations

How can you identify the crawl errors that truly deserve correction?

Start by cross-referencing Search Console with your Analytics data. A 404 error on a URL that generated 500 monthly visits three months ago is relevant. An error on a page that has never been visited since its creation is probably not.

Then, examine the context of occurrence. 404s from your internal linking must be corrected because they break navigation and dilute PageRank. Those from outdated external backlinks may justify a redirect if the potential traffic volume warrants it.

Always systematically prioritize server errors (5xx) and timeouts. These problems signal a fragile infrastructure that Google may interpret as a risk of poor user experience. A site that regularly returns 503 loses crawl frequency.

What sitemap structure should you adopt to facilitate monitoring?

The pragmatic rule: one sitemap per content type with distinct update frequencies. E-commerce products, blog articles, corporate pages, category pages, media — each type in its own file. This allows you to immediately spot if a specific section is facing issues.

Add dynamic sitemaps that regenerate automatically with each publication or modification. A static sitemap manually updated is a guaranteed source of errors. Modern CMS platforms offer modules that manage this generation in real time.

Limit each file to 10,000-20,000 URLs for optimal readability in Search Console. A technically valid file of 50,000 URLs becomes unmanageable when analyzing coverage rates. Modularity facilitates diagnostics.

Should you really ignore all non-strategic errors?

No, and this is where Google's statement deserves nuance. An abnormally high volume of 404 errors often reveals a systemic issue: automatically generated URL parameters, session IDs in links, badly configured infinite pagination. These root causes must be addressed.

Likewise, recurrent errors on specific URL patterns generally indicate an application bug or faulty rewrite configuration. Fixing the origin prevents the problem from recurring indefinitely.

The effective approach is to segment errors by type and origin, then address clusters that reveal structural dysfunctions. Ignoring 5,000 errors individually without understanding the common cause is a strategic error.

  • Monthly export Search Console errors and cross-check with Analytics to identify those affecting actual traffic
  • Create separate sitemaps by content type with automatic generation upon each publication
  • Set alerts on 5xx errors and timeouts to respond immediately to server issues
  • Analyze URL patterns in 404 errors to detect application bugs or faulty configurations
  • Implement 301 redirects only for URLs that generated significant organic traffic
  • Quarterly audit your internal linking to eliminate links to 404 pages
Optimal management of crawl errors and sitemaps relies on a selective and analytical approach. Focus your resources on errors blocking access to strategic content, structure your sitemaps to ease monitoring rather than influence the algorithm, and address root causes rather than individual symptoms. This technical strategy requires deep expertise in log analysis and SEO architecture. If your team lacks the resources or specialized skills to carry out these optimizations, partnering with an experienced SEO agency can significantly speed up the identification and resolution of critical blockages while avoiding false priorities.

❓ Frequently Asked Questions

Combien de temps Google garde-t-il en mémoire les erreurs 404 corrigées ?
Google peut conserver l'historique des 404 pendant plusieurs mois dans Search Console même après correction. Le délai de disparition dépend de la fréquence de recrawl de l'URL concernée. Une fois la page accessible et recrawlée avec succès, l'erreur finit par sortir des rapports.
Un sitemap de 50 000 URL est-il moins efficace que cinq sitemaps de 10 000 URL ?
Non, Google traite les deux configurations de manière identique en termes d'indexation. La différence réside uniquement dans votre capacité à monitorer et diagnostiquer les problèmes par segment de contenu. Choisissez la structure qui facilite votre gestion opérationnelle.
Faut-il supprimer les URL 404 du sitemap ou les laisser pour que Google comprenne qu'elles sont supprimées ?
Supprimez-les systématiquement. Un sitemap doit référencer uniquement les URL actives et indexables. Laisser des 404 dans le sitemap crée du bruit et peut donner l'impression d'une maintenance négligée, sans aucun bénéfice communicationnel vers Google.
Les erreurs soft 404 sont-elles aussi graves que les 404 classiques ?
Elles sont potentiellement plus problématiques car elles indiquent une confusion au niveau applicatif. Google détecte du contenu vide ou générique sur une URL censée être valide, ce qui peut déclencher une désindexation ou une réduction du crawl sur cette section. Traitez-les en priorité.
Combien d'erreurs 404 dans Search Console deviennent problématiques pour le SEO ?
Il n'existe pas de seuil universel. Un site de 100 pages avec 500 erreurs 404 signale un dysfonctionnement grave. Un site de 100 000 pages avec 2 000 erreurs historiques peut être parfaitement sain. Analysez le ratio erreurs/pages totales et surtout l'origine et la récurrence des erreurs plutôt que le volume absolu.
🏷 Related Topics
Crawl & Indexing AI & SEO Search Console

🎥 From the same video 18

Other SEO insights extracted from this same Google Search Central video · duration 1h04 · published on 27/12/2016

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