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Official statement

Indexing follows four steps: 1) Discovery of the URL, 2) Crawl to retrieve the content, 3) Indexing on the servers, 4) Display in the results. 'Detected - not indexed' means discovered but not yet crawled. 'Crawled - not indexed' means crawled but not indexed for various reasons.
13:12
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Extracted from a Google Search Central video

⏱ 1h01 💬 EN 📅 27/01/2022 ✂ 18 statements
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Other statements from this video 17
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  4. 7:54 Faut-il s'inquiéter des variations d'URL pour le référencement ?
  5. 18:45 Pourquoi les rapports de couverture de Search Console sont-ils parfois à la traîne ?
  6. 20:08 Faut-il obligatoirement mentionner les sources externes pour AggregateRating ?
  7. 25:45 Pourquoi la relation entre sites d'un même groupe ne garantit-elle pas les avis SEO ?
  8. 27:47 Comment Google utilise-t-il réellement vos rapports de spam ?
  9. 32:29 Comment Google utilise-t-il réellement les Spam Reports pour améliorer ses algorithmes ?
  10. 35:52 Pourquoi privilégier robots.txt pour bloquer le crawl ?
  11. 39:18 Pourquoi miser sur le canonical plutôt que de bloquer le crawl ?
  12. 42:07 Pourquoi privilégier le DMCA pour le contenu copié plutôt que Search Console ?
  13. 44:00 Pourquoi les demandes DMCA pourraient-elles impacter votre strategie SEO ?
  14. 46:06 Pourquoi Google limite-t-il les demandes DMCA à 1000 URLs ?
  15. 48:41 Pourquoi optimisons-nous encore pour Google au lieu des lecteurs ?
  16. 54:27 Les campagnes de commentaires clients sont-elles devenues un piège à pénalité Google ?
  17. 56:02 Pourquoi l'attribut UGC est-il crucial pour vos liens de commentaires de blog ?
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Official statement from (4 years ago)
TL;DR

Indexing in four steps: discovery, crawl, indexing, display. 'Detected - not indexed' and 'Crawled - not indexed' illustrate critical phases where the URL is not progressing in the process. Mastering these steps is crucial for any SEO.

What you need to understand

What’s the difference between detected and crawled? <\/h3>

'Detected' means that the URL is identified by Google but not yet explored. 'Crawled' indicates that the content of the URL has been retrieved.<\/p>

  • Detection: The first steps of the URL towards visibility.<\/li>
  • Crawl: Retrieval of content, essential to move towards indexing.<\/li><\/ul>

    Why do some URLs fail to be indexed? <\/h3>

    Several reasons can explain this: low-quality content, technical errors, or restrictions in the robots.txt file. Identifying the problem is key.<\/p>

    Reminder: Not all crawled content is automatically indexed.<\/p>

    • Check for errors via Google Search Console.<\/li>
    • Ensure that the content deserves indexing.<\/li><\/ul>

SEO Expert opinion

Is the statement realistic considering the practices observed? <\/h3>

Often, the gap between theory and practice reveals itself. Many professionals report that some URLs remain stuck in 'crawled - not indexed' without any obvious explanation. [To be verified]<\/strong><\/p>

Is Google transparent about these steps? <\/h3>

Not always. While the general order of operations is clear, the ground reality shows nuances. Sometimes, excellent content stagnates.<\/p>

Caution: Keep an eye on the Search Console tool and server logs to pick up on invisible clues.<\/div>

Practical impact and recommendations

What concrete actions can I take to improve indexing? <\/h3>

Optimize pre-crawl steps. Ensure that URLs are easily accessible and that robots.txt files do not block crawling.<\/p>

  • Regularly review XML sitemaps.<\/li>
  • Manage crawl budget.<\/li>
  • Analyze server logs to detect anomalies.<\/li><\/ul>

    What mistakes should I avoid to prevent stagnation? <\/h3>

    Avoid duplicate content. Ensure a strong internal linking structure that facilitates the work of the bots.<\/p>

    How can I check that my site remains indexed? <\/h3>

    Use Google Search Console. Monitor alerts and reported issues. Adjust your strategies based on concrete feedback.<\/p>

    In summary, identifying and resolving any indexing obstacles upstream can be complex. Getting support from a specialized agency can be wise to avoid costly mistakes and benefit from a tailored strategy.<\/div>

❓ Frequently Asked Questions

Qu'est-ce que signifie 'Détecté - non indexé' ?
'Détecté - non indexé' indique que l'URL est connue mais pas encore explorée par Google.
Pourquoi certaines URL restent-elles 'Crawlé - non indexé' ?
Cela peut être dû à un contenu faible, des restrictions d'accès ou des erreurs techniques.
Comment améliorer la découverte de mes URL ?
Optimisez votre maillage interne et soumettez des sitemaps à Google.
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