B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Current
40%
40% -- ranking lift for Inverted authority topical cluster model vs. flat hub-and-spoke architecture (2026)
The inverted authority topical cluster model achieved a +40% ranking lift compared to flat hub-and-spoke architecture across a dataset of 2,000 sites.
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Lighthouse Research Team
Last verified:
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Source verified
Evidence graded
Value
40%
Unit
Percentage
Data Vintage
2026
Entity
Sample Size
2,000
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
45
Freshness
95
Source
TopicalMap.ai
Primary
Tier C
https://blog.gtm8020.com/internal-linking ↗
Source Article
Internal links teach LLMs how concepts connect.
SEO RESEARCH REPORT · 2026 · VERTICAL: ALL
Internal links teach LLMs how concepts connect.
What’s inside
Schema is conflicted. Backlinks are slow. Internal linking is the on-page lever where the evidence converges: 5–25% organic lifts from independent A/B tests, and +100–150% AI search traffic from …
Original Research
TopicalMap.ai
· Original study ↗
Methodology
Based on TopicalMap.ai dataset of 2,000 sites ('2k sites').
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
Inverted authority topical cluster model vs. flat hub-and-spoke architecture: 40% ranking lift. Source: TopicalMap.ai (2026). Via Lighthouse Intelligence -- https://lighthousedata.io/data/ranking-lift-inverted-authority-model
HTML Embed
<blockquote cite="https://lighthousedata.io/data/ranking-lift-inverted-authority-model" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>40%</strong> -- ranking lift for Inverted authority topical cluster model vs. flat hub-and-spoke architecture<br><small>Source: TopicalMap.ai (2026) · <a href="https://lighthousedata.io/data/ranking-lift-inverted-authority-model" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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