B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Recent
100%
100% -- share of manual action sites with signs of ai generated content for Google manual action sites (2025-04)
100% of 80,000 sites with Google manual actions against them had clear signs of AI-generated content based on an AI checker.
Attribution:
View source
Lighthouse Research Team
Last verified:
·
How we verify data →
Source verified
Evidence graded
Value
100%
Unit
Percentage
Data Vintage
2025-04
Entity
Sample Size
80,000
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
BrightonSEO presentation
Primary
Tier C
https://www.appius.com/blog/top-ten-takeaways-brightonseo-april-2025 ↗
Source Article
What our clients learned from SEO Brighton April 2025
As we approach another SEO Brighton in October we reveal the insights from April 2025 that were most valued by our clients across the last 6 months.
Read on to check out the things that most affected our SEO activities and advice in the last 6 months - would your list be the same? As ever we divide …
Original Research
BrightonSEO presentation
· Original study ↗
Methodology
Detected via AI content checker on 80,000 sites with Google manual actions
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
Google manual action sites: 100% share of manual action sites with signs of ai generated content. Source: BrightonSEO presentation (2025-04). Via Lighthouse Intelligence -- https://lighthousedata.io/data/manual-actions-sites-ai-content-signs-2025
HTML Embed
<blockquote cite="https://lighthousedata.io/data/manual-actions-sites-ai-content-signs-2025" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>100%</strong> -- share of manual action sites with signs of ai generated content for Google manual action sites<br><small>Source: BrightonSEO presentation (2025-04) · <a href="https://lighthousedata.io/data/manual-actions-sites-ai-content-signs-2025" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
Share
Use this data in your work
Copy the citation, embed the widget, or explore thousands more verified marketing statistics -- all free.