B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Recent
15%
15% -- share of ai summary sources for Wikipedia, YouTube, and Reddit (2025)
Wikipedia, YouTube, and Reddit accounted for 15% of all sources listed in Google AI summaries.
Attribution:
View source
Lighthouse Research Team
Last verified:
·
How we verify data →
Source verified
Evidence graded
Value
15%
Unit
Percentage
Data Vintage
2025
Entity
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
60
Independence
30
Methodology
45
Freshness
95
Source
Pew Research Center
Primary
Tier C
https://firstascentdesign.com/ai-search-optimization-aeo-geo/ ↗
Source Article
AEO vs GEO: What They Mean for SEO | First Ascent Blog
Once upon a time, search was simple. You picked your topic and keywords, wrote a helpful post, crossed your fingers, and hoped Google would send you clicks. Now, more users are skipping links entirely and turning to AI-generated answers instead. Tools like ChatGPT, Gemini, and Perplexity pull conten…
Original Research
Pew Research Center
· Original study ↗
Methodology
Pew Research analysis of sources cited in Google AI summaries and search results
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
Wikipedia, YouTube, and Reddit: 15% share of ai summary sources. Source: Pew Research Center (2025). Via Lighthouse Intelligence -- https://lighthousedata.io/data/top-cited-sources-ai-summaries-15-percent
HTML Embed
<blockquote cite="https://lighthousedata.io/data/top-cited-sources-ai-summaries-15-percent" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>15%</strong> -- share of ai summary sources for Wikipedia, YouTube, and Reddit<br><small>Source: Pew Research Center (2025) · <a href="https://lighthousedata.io/data/top-cited-sources-ai-summaries-15-percent" 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.