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Crawl Error

A crawling error is a problem in which a search engine crawler fails or receives a different response than expected while accessing a web page or collecting content. Server errors, 404s, redirect loops, and blocking settings are the main causes, and they must be checked after site migration.

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Crawl errors can be caused by server errors, DNS issues, blocking policies, redirect loops, 404s, slow responses, JavaScript rendering issues, etc.

Sites with many errors make it difficult for search engines to reliably collect important pages. In particular, crawling errors must be checked quickly after site migration or large-scale deployment.

By looking at Search Console, server logs, and crawling tools together, you can see which responses came from which URLs.

Crawl errors can reoccur after deployment, server configuration, redirect changes, or security policy changes. Rather than checking it once and being done with it, you should check it periodically.

Key takeaways

  • This is a problem in which the crawler fails to access or collect pages.
  • Server errors, 404s, redirect loops, and blocking policies can be the cause.
  • This can lead to pages missing from the index and a drop in traffic.
  • Check through Search Console and log file analysis.

References

Frequently asked questions

How do you respond if crawling errors suddenly increase?

Check the error type (server error, 404, blocked, etc.) in your Search Console coverage report. Identify the cause by comparing it with the deployment history. If it is completely blocked (robots.txt Disallow: /), correct it immediately, if 404 is rapidly increasing, check the redirect settings, and if it is a 5xx error, check the server log to resolve the root cause.

Do crawling errors necessarily have a negative impact on SEO?

Not all errors have an immediate impact. Sporadic 404s on unimportant pages are normal. However, errors on key pages, patterns of rapidly increasing error counts, and persistent server errors can impact search exposure and indexing. Look at the error rate and scope of impact together.

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