What does generative AI actually retrieve from the open web?
A longitudinal first-party research program measuring how Google generative-AI features retrieve evidence, frameworks, and knowledge objects across publisher-controlled web properties.
AI visibility is not the same thing as search traffic. The Observatory measures a different layer: when a search system chooses a site's knowledge as material for a generative answer. Baseline #001 begins with two structurally different sites and 92 days of first-party Search Console data.
Baseline #001
The two sites differ in audience and subject matter, so raw counts are not directly comparable. The useful measures normalize AI retrieval against each site's own Search exposure and page universe.
TrailGenic
First-hand field evidence · consumer / longevityexmxc
Frameworks · defined concepts · institutional intelligenceAI Retrieval Share = Generative-AI impressions ÷ Web Search impressionsGoogle states that the Generative AI report is part of the Web Search performance dataset. The ratio therefore estimates the share of a property's reported Web impressions occurring inside supported generative-AI features; it does not add AI impressions on top of Web totals.
Retrieval propensity by content family
Normalizing by ordinary Search exposure separates pages that are simply popular from pages that appear unusually often in generative retrieval.
TrailGenic
| Family | AI/Web share |
|---|---|
| Trail Logs | 26.0% |
| Gear Reviews | 23.7% |
| Science | 20.4% |
| Lexicon | 12.9% |
| Playbooks | 9.6% |
| Nutrition Reviews | 8.1% |
exmxc
| Family | AI/Web share |
|---|---|
| Frameworks | 9.1% |
| Lexicon | 8.8% |
| sPEG Index family | 5.9% |
| Entity Clarity Index | 2.8% |
| Signal Briefs | 1.8% |
The denominator changes the story
The pages with the most AI impressions are not always the pages with the highest retrieval propensity.
| Knowledge object | Property | Web | AI | AI share |
|---|---|---|---|---|
| Baldy winter field log | TrailGenic | 368 | 229 | 62.2% |
| Mafate vs Caldera vs Hierro | TrailGenic | 459 | 208 | 45.3% |
| ATH vs LMNT altitude fuel-curve science | TrailGenic | 806 | 285 | 35.4% |
| Electrolytes at elevation | TrailGenic | 624 | 161 | 25.8% |
| sPEG — Scarcity-Adjusted PEG | exmxc | 115 | 27 | 23.5% |
| Four Forces / Four Pillars | exmxc | 142 | 19 | 13.4% |
| Alphabet $80B signal brief | exmxc | 3,136 | 40 | 1.3% |
Findings to test longitudinally
First-hand evidence appears unusually retrieval-prone.
Trail logs, field comparisons, gear tests and derived physiological analysis produce some of the highest normalized retrieval rates in the baseline.
Defined concepts outperform newsier content on exmxc.
Frameworks and Lexicon pages receive substantially more AI impressions relative to ordinary Search exposure than Signal Briefs.
One AI experience can retrieve multiple URLs from one domain.
Google's property and page aggregation differ when multiple URLs from the same site appear. Baseline factors are 1.087× for TrailGenic and 1.058× for exmxc.
AI retrieval can occur without observable visits.
The Baldy field log recorded 229 AI impressions while the Web Search export recorded zero clicks. Retrieval measures an exposure layer traffic analytics alone misses.
Preregistered hypotheses
Written before the September checkpoint. Future reports will record support, contradiction or ambiguity rather than rewrite the premise after seeing the outcome.
Original evidence increases retrieval magnitude.
First-hand tests, original measurements, proprietary datasets and direct observations will receive disproportionate generative-AI retrieval versus commodity summaries.
Comparative pages outperform broad explainers.
Pages that help a user choose, distinguish or evaluate will show higher normalized retrieval than broad informational pages.
Knowledge architecture increases breadth.
Entity, lexicon and framework architecture will correlate more with retrieval coverage and multi-URL retrieval than with raw volume alone.
Retrieval context differs by knowledge market.
Consumer experiential knowledge will remain more mobile-skewed; institutional and strategic knowledge will remain more desktop-skewed.
TrailGenic momentum
Same-length windows reduce distortion from partial calendar months.
| Window | Web impressions | AI impressions | AI Retrieval Share |
|---|---|---|---|
| May 30–June 28 | 3,878 | 348 | 9.0% |
| July 31–August 29 | 5,547 | 950 | 17.1% |
Methodology and boundaries
First-party Search Console exports
Baseline #001 uses Web Performance and Generative AI Performance exports downloaded August 31, 2026. The observed reporting window ends August 29.
Host variants normalized for coverage.
www / non-www variants are normalized when counting canonical knowledge objects. Raw property and page impression counts remain Google's reported values.
Observational, not causal.
The sites operate in different query markets, with different histories and addressable demand. A higher retrieval share does not prove one architecture is intrinsically superior.
The triggering questions are hidden.
The report exposes pages, countries, devices and dates, but not exact prompts. Content-level interpretation is inference, not prompt-level attribution.
Research log
Baseline #001 frozen. exmxc and TrailGenic exports preserved; metrics and four hypotheses preregistered.
Checkpoint #002 scheduled. Re-export both properties and compare share, coverage, multi-URL retrieval, concentration and device mix.
Longitudinal report. Publish when accumulated observations support a meaningful update; monthly measurement does not require monthly narrative.
Treatment #003 deployed — ECI named-evidence exposure. Post-baseline intervention: the Entity Clarity Index hub now surfaces selected dated entity evidence, and Finance plus Technology report summaries expose company-specific examples with explicit interpretation boundaries. Baseline #001 metrics remain frozen and unchanged.
Primary measurement references
- Google Search Console — Generative AI performance report (Search)
- Google — How impressions, positions and clicks are counted, including AI Mode and AI Overviews
- Google Search Console — Search Performance report methodology
- Google Search Console — Data anomalies
Metric definitions. AI Retrieval Share = property-level Generative AI impressions ÷ property-level Web Search impressions. AI Retrieval Coverage = normalized canonical pages with at least one Generative AI impression ÷ normalized canonical pages with at least one Web Search impression. Multi-URL Retrieval Factor = sum of page-level Generative AI impressions ÷ property-level Generative AI impressions.
Interpretation boundary. “Retrieved” means a link to the property was reported as shown within a supported Google generative-AI Search feature. It does not prove that a specific sentence was quoted, that a model trained on the page, that the page caused the answer, or that the user visited the site.
Working model, not conclusion. Baseline #001 motivates a testable proposition: original evidence may create information gain, while knowledge architecture may make that evidence easier to identify, retrieve and combine.