B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Aging
129
129 -- sites never recovered after helpful content update for Helpful Content Update cohort sites (2024)
129 of 130 sites in Lily Ray's Helpful Content Update cohort never recovered after Google's March 2024 core update.
Attribution:
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Lighthouse Research Team
Last verified:
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Source verified
Evidence graded
Value
129
Unit
Count
Data Vintage
2024
Entity
Sample Size
130
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
75
Source Trust
60
Citation Chain
20
Independence
30
Methodology
45
Freshness
95
Source
Lily Ray
Primary
Tier B
https://www.gogochimp.com/blog/ai-seo-2026 ↗
Source Article
What Is AI SEO in 2026? Discipline, 3 Pillars, 6 Moves
AI SEO in 2026: What It Is and the Strategy That Actually Works
AI SEO
AI SEO is the discipline of structuring content, entity signals, and third-party trust so ChatGPT, Perplexity, Gemini, AI Overviews, and Microsoft Copilot cite your brand inside their generated answers. GoGoChimp earned 5,967 fir…
Original Research
Lily Ray
· Original study ↗
Methodology
Lily Ray cohort analysis of Google March 2024 core update
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
Helpful Content Update cohort sites: 129 sites never recovered after helpful content update. Source: Lily Ray (2024). Via Lighthouse Intelligence -- https://lighthousedata.io/data/lily-ray-helpful-content-recovery
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<blockquote cite="https://lighthousedata.io/data/lily-ray-helpful-content-recovery" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>129</strong> -- sites never recovered after helpful content update for Helpful Content Update cohort sites<br><small>Source: Lily Ray (2024) · <a href="https://lighthousedata.io/data/lily-ray-helpful-content-recovery" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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