B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Current
17.3%
17.3% -- citation rate improvement for AI search engines (Google AIO, ChatGPT, Perplexity, Gemini) (2026)
Document structure alone drives an average 17.3% citation rate improvement across six AI search engines.
- The study tested document structure in isolation, not a live test of topic cluster architecture across a real site.
Attribution:
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Lighthouse Research Team
Last verified:
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Source verified
Evidence graded
Value
17.3%
Unit
Percentage
Data Vintage
2026
Entity
Geography
Global
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
arXiv
Primary
Tier B
https://betteraisearch.com/tactics/topic-cluster-geo ↗
Source Article
Topic Cluster Architecture for AI Search
Original Research
arXiv
· Original study ↗
Methodology
arXiv study on structural feature engineering across 6 AI engines; document structure tested in isolation
Methodology documented
Segmentation
IndustryAI & Machine Learning
RegionGlobal
RoleAll marketers
Channelmulti-channel
Cite this stat
Plain Text
AI search engines (Google AIO, ChatGPT, Perplexity, Gemini): 17.3% citation rate improvement. Source: arXiv (2026). Via Lighthouse Intelligence -- https://lighthousedata.io/data/document-structure-citation-improvement-17-3
HTML Embed
<blockquote cite="https://lighthousedata.io/data/document-structure-citation-improvement-17-3" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>17.3%</strong> -- citation rate improvement for AI search engines (Google AIO, ChatGPT, Perplexity, Gemini)<br><small>Source: arXiv (2026) · <a href="https://lighthousedata.io/data/document-structure-citation-improvement-17-3" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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