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Analytics, Algorithms & Auditing
Lesson 11 of 15 ยท SEO Auditing
FREE +50 XP
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Crawl & Indexation Audit

๐Ÿ•ท๏ธ
Screaming Frog finishes the crawl
"14 pages returning 404. 3 important pages blocked in robots.txt. 7 pages have redirect chains with 3+ hops. A 30-minute crawl audit โ€” and there's a month of work already."
๐Ÿ“Œ Crawl audit โ€” checking how search robots crawl and index the site. Goal: ensure important pages are accessible and unnecessary ones are blocked.

Key Crawl Audit Checks

  • Pages with 4xx/5xx errors โ€” broken or inaccessible pages
  • Redirect chains and loops โ€” chains slow down crawling
  • Noindex on important pages โ€” a critical error that's easy to make accidentally
  • Pages in robots.txt Disallow โ€” check that CSS/JS Google needs isn't blocked
  • Orphan pages โ€” pages with no internal links, invisible to Googlebot
  • Duplicates (canonical) โ€” URLs with parameters, www/non-www, http/https

HTTP Status Codes in Crawling

CodeMeaningAction
200All OKNormal
301Permanent redirectUpdate internal links
404Page not foundRestore or redirect
503Server unavailableUrgent โ€” Google may deindex
๐ŸŽฏ Tip: set up 404 monitoring in GSC โ†’ Indexing โ†’ Pages. New 404s often appear after CMS updates or redesigns.
๐ŸŽฎ Test yourself: which HTTP code means a page was permanently moved?
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Lesson Task
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โ† SEO Audit Framework
Lesson 11 of 15
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