Case study: clearing 18k soft-404s to recover crawl trust
Setup: A classifieds site had 18,000 expired listings returning 200 OK with an empty 'no results' template — classic soft-404s. GSC's Coverage report flagged 'Soft 404' as the top exclusion.
What it did well:
— Switching expired pages to real 410 Gone (not 404) cleared them from the index in ~3 weeks
— Googlebot reallocated crawls: live-listing crawl frequency rose noticeably in Crawl Stats
Where it fell short:
— GSC's soft-404 detection is opaque and slow to update; validation 'Started' sat for 10 days
— 410 is aggressive — we accidentally 410'd 300 pages that should've redirected, losing their links
Verdict: 4/5. Fixing soft-404s is one of the highest-leverage indexing cleanups on big sites.
Best for: listings/classifieds with churn. Not for: evergreen sites with stable URLs.
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Case study: clearing 18k soft-404s to recover crawl trust
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