Study Overview
Research institutions: Princeton University Department of Computer Science + Moz Research Study period: October 2025 – March 2026 (6-month tracking) Sample size: Analyzed the appearance of 500,000 URLs in Google AI Overviews Published at: WWW 2026 (The Web Conference)
Key Findings
Finding 1: Schema configuration is positively correlated with AI citation rate
| Schema configuration | AI Overview citation rate |
|---|---|
| No Schema configured | 4.2% |
| Article/BlogPosting Schema configured | 11.3% |
| FAQ Schema configured | 13.6% |
FAQ Schema had the most pronounced effect — its average citation rate was 3.2x that of pages with no Schema.
Finding 2: FAQ Schema quality drives the difference in results
- FAQ Schema with fewer than 3 questions: limited improvement (about 1.4x)
- 3–7 questions, with each answer 100–200 words: best results (3.2x)
- More than 10 questions: diminishing returns (2.1x)
Conclusion: Schema is an amplifier, not a substitute. Build great content first, then add Schema.
Practical Recommendations for Practitioners
- Add FAQPage Schema to all core informational pages
- Add Article Schema to articles (including publication date and author information)
- Add HowTo Schema to step-by-step guides
Use our Schema generator to quickly generate Schema code of every type.