B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Current
4%
4% -- content signals adoption rate for Top 200,000 domains scanned by Cloudflare (2026)
4% of top 200,000 domains scanned by Cloudflare have declared AI usage preferences via Content Signals.
- Filtered to exclude redirects, ad servers, and tunnelling services
Attribution:
View source
Lighthouse Research Team
Last verified:
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Source verified
Evidence graded
Value
4%
Unit
Percentage
Data Vintage
2026
Entity
Sample Size
200,000
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
95
Source Trust
60
Citation Chain
20
Independence
30
Methodology
45
Freshness
95
Source
Cloudflare
Primary
Tier A
https://seohandbook.co.uk/ai-search/agent-readiness/ ↗
Source Article
Agent-readiness | The SEO Handbook
Agent-readiness
Last updated
Traditional SEO has two layers: a content layer (what a page says) and a technical layer (whether search engines can access it). The same split is forming for AI agents. Generative Engine Optimisation and agentic search address the content layer: what agents retrieve and…
Original Research
Cloudflare
· Original study ↗
Methodology
Share of scanned domains declaring AI usage preferences via Content Signals in robots.txt; from Cloudflare's agent-readiness scan of 200,000 top domains.
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
Top 200,000 domains scanned by Cloudflare: 4% content signals adoption rate. Source: Cloudflare (2026). Via Lighthouse Intelligence -- https://lighthousedata.io/data/cloudflare-top-domains-content-signals-adoption
HTML Embed
<blockquote cite="https://lighthousedata.io/data/cloudflare-top-domains-content-signals-adoption" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>4%</strong> -- content signals adoption rate for Top 200,000 domains scanned by Cloudflare<br><small>Source: Cloudflare (2026) · <a href="https://lighthousedata.io/data/cloudflare-top-domains-content-signals-adoption" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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