SEO Geo

# AI Search / GEO Optimization (May 2026)

## Primary Source: Google's AI Optimization Guide

Google's official position, published under Search Central docs:

> "Optimizing for generative AI search is **still SEO** from Google's
> perspective. AEO and GEO are rebranded labels for the same work."

Read `references/google-ai-optimization-guide.md` for the full synthesis,
myth-busting list (`llms.txt`, chunking, AI-rephrasing, mention-farming —
all rejected by Google as ineffective), and the Who/How/Why test for
content quality.

Audits should frame GEO findings as **SEO fundamentals applied to AI-search
surfaces**, not as a separate optimization discipline. When community
recommendations contradict Google's primary source, defer to Google and note
the contradiction in the report.

## Key Statistics

| Metric | Value | Source |
|--------|-------|--------|
| AI Overviews reach | 1.5 billion users/month across 200+ countries | Google |
| AI Overviews query coverage | 50%+ of all queries | Industry data |
| AI Mode monthly users | 1B+ (surpassed May 2026) | Google |
| AI Mode model | Gemini 3.5 Flash (default, global, since I/O 2026) | Google |
| AI-referred sessions growth | 527% (Jan-May 2025) | SparkToro |
| ChatGPT weekly active users | 900 million | OpenAI |
| Perplexity monthly queries | 500+ million | Perplexity |

## Critical Insight: Brand Mentions > Backlinks

**Brand mentions correlate 3x more strongly with AI visibility than backlinks.**
(Ahrefs December 2025 study of 75,000 brands)

| Signal | Correlation with AI Citations |
|--------|------------------------------|
| YouTube mentions | ~0.737 (strongest) |
| Reddit mentions | High |
| Wikipedia presence | High |
| LinkedIn presence | Moderate |
| Domain Rating (backlinks) | ~0.266 (weak) |

**Only 11% of domains** are cited by both ChatGPT and Google AI Overviews for the same query, so platform-specific optimization is essential.

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## GEO Analysis Criteria (Updated)