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Official statement

You should not automatically copy the technical markup of major websites, even those belonging to Google, as they may contain errors or use non-standard internal codes that only work within their system but are not valid for the web in general.
🎥 Source video

Extracted from a Google Search Central video

💬 EN 📅 12/11/2021 ✂ 30 statements
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Other statements from this video 29
  1. Is it true that Google prioritizes its own platforms in search rankings?
  2. Should you split your backlinks between two different URLs?
  3. Why doesn't Google automatically hide Chrome extension pages on mobile?
  4. Does Google really slow down crawling on pages that are in prolonged no-index?
  5. How can temporary internal linking boost your reindexing speed?
  6. Is it true that changing your URL could cost you valuable SEO data?
  7. Can canonical and hreflang tags actually work together on the same page?
  8. Why should you avoid using canonicals between language versions?
  9. How do you choose between no-index and canonical for an effective SEO strategy?
  10. Should you combine no-index and canonical tags to enhance your SEO signals?
  11. Why does the crawl rate take longer to recover than to decline?
  12. Should you use the form to boost your crawl rate?
  13. Why is a 500-millisecond response time essential for effective SEO crawling?
  14. Why doesn't a reduced crawl rate from Google lead to the deindexing of your pages?
  15. Why does Google keep crawling old mobile subdomains?
  16. How does Googlebot's geographic limitations affect content indexing?
  17. Is it true that the ES-419 code is a critical error for hreflang?
  18. Why doesn't Google assign a single quality score for SEO?
  19. How could bold text influence your SEO strategy?
  20. How can overusing bold text harm your SEO efforts?
  21. How does semantic HTML enhance your SEO performance?
  22. Is it really necessary to manage over 10,000 links per page to optimize your SEO?
  23. Should you favor a hierarchical structure to boost your SEO?
  24. Why is Google Discover traffic so unpredictable for SEO professionals?
  25. What makes Google Discover's SEO standards so much stricter?
  26. Does response time really impact how Google crawls your site?
  27. Do PWAs Really Impact Your SEO?
  28. Is it essential to redesign older websites for better performance?
  29. What unique SEO challenges do JavaScript PWAs bring?
📅
Official statement from (4 years ago)
TL;DR

Avoid copying the markup of major websites. They may contain errors or non-standard internal codes that could harm your SEO.

❓ Frequently Asked Questions

Quels sont les codes internes non standards ?
Ce sont des codes développés pour des systèmes spécifiques. Ils peuvent ne pas fonctionner correctement dans d'autres contextes.
Les grands sites sont-ils aussi conformes ?
Pas toujours. Ils peuvent tolérer des erreurs qui passeraient inaperçues pour leur SEO ou ne les affecteraient pas autant.
Quels outils utiliser pour vérifier mon balisage ?
Google's Structured Data Testing Tool et Rich Results Test sont recommandés pour valider votre structure.
🏷 Related Topics
Domain Age & History Content AI & SEO

🎥 From the same video 29

Other SEO insights extracted from this same Google Search Central video · published on 12/11/2021

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