B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Recent
25%
25% -- organic traffic decrease for Websites publishing auto-generated (AI) content (2025)
Auto-generated content experienced a 25% traffic decrease after approximately three months according to SEO experiments by Mark Williams-Cook.
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Lighthouse Research Team
Last verified:
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Source verified
Evidence graded
Value
25%
Unit
Percentage
Data Vintage
2025
Entity
Evidence Quality
B
Strong, reliable evidence
Sourced from a well-regarded research firm or industry leader with transparent methodology and a reasonably large sample.
Single source - not yet corroborated
Score breakdown
Extraction
50
Source Trust
60
Citation Chain
20
Independence
30
Methodology
35
Freshness
95
Source
Mark Williams-Cook (detailed by Search Engine Land)
Primary
Tier C
https://editeverafter.com/blog/seo-myths/ ↗
Source Article
10 SEO Myths Debunked + Actionable Checklist for Lasting Results
Maybe you’ve heard that stuffing keywords is the best way to get to the top of Google. Or that more content automatically means more traffic. Like a mythical Hydra head, SEO myths keep coming back no matter how many times they’re debunked. These common SEO misconceptions are pervasive and compelling…
Original Research
Mark Williams-Cook (detailed by Search Engine Land)
· Original study ↗
Methodology
Result of multiple SEO experiments by Mark Williams-Cook; auto-generated content ranked in the short term, then traffic declined after approximately three months; cited via Search Engine Land
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
Websites publishing auto-generated (AI) content: 25% organic traffic decrease. Source: Mark Williams-Cook (detailed by Search Engine Land) (2025). Via Lighthouse Intelligence -- https://lighthousedata.io/data/ai-content-25-traffic-decrease-3-months
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<blockquote cite="https://lighthousedata.io/data/ai-content-25-traffic-decrease-3-months" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>25%</strong> -- organic traffic decrease for Websites publishing auto-generated (AI) content<br><small>Source: Mark Williams-Cook (detailed by Search Engine Land) (2025) · <a href="https://lighthousedata.io/data/ai-content-25-traffic-decrease-3-months" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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