Method Guides

How AI answers actually work

What we've measured about getting recommended in AI answers, written to be used rather than admired. Every number here re-derives to specific questions and specific engines, and where a mechanism is unproven we say so.

And why it isn't copy-paste from SEOStart here
How to navigate AEO

Search gives you a list; an AI answer makes a choice. A four-layer model - eligibility, demand, evidence, measurement - with the sourced numbers and the test to run on any vendor.

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The limit nobody else names
What AI visibility tools can and can't measure

Tools measure retrieval: what engines answer today and which pages they read. No tool can see inside a model's training. The difference decides what you can fix and how fast.

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Yes, unevenly - here are the counts
Does AI read Instagram?

Instagram pages showed up as cited sources in 34 of 276 answers in one consumer-retail measurement, and two of four engines did all of it. What to do about it, and what not to.

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Before anyone rewrites the plan
When the numbers don't move

Six checks, in order: was the wave comparable, did the model change, is it inside the noise floor, did the fix actually get indexed, are you pushing the un-movable layer, and has it simply not been long enough.

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Access, rendering, structure, evidence
The readiness pass

The checks that decide whether AI engines can read your site at all - crawler access, JS dependence, answerable structure, verifiable facts - and the fashionable checks we refuse to score.

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The words we use
AI visibility metrics, defined

Visibility rate, top-3 rate, #1 pick rate, citation, grounding query, AI-sourced vs AI-influenced. What each number counts, what it can't say, and why a score out of 100 isn't measurement.

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One question, many searches
What is query fan-out?

Before an engine answers, it rewrites the buyer's question into several internal searches and reads the winners. How fan-out works, why it varies by engine, and what it breaks about keyword thinking.

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Three buckets, not one
Which AI crawlers matter?

GPTBot trains models. OAI-SearchBot builds a search index. ChatGPT-User fetches live for a person mid-answer. Three different jobs, three different robots.txt decisions - most sites treat them as one.

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Honest answer: unproven
What is llms.txt - does it work?

A proposed standard for handing AI engines a curated map of your site. No major engine has confirmed consuming it. We publish one anyway - here's the honest case for a cheap hedge.

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Readability aid, not magic lever
Does schema markup help AI visibility?

JSON-LD makes your facts machine-legible and costs little. What's actually evidenced, what's vendor folklore, and where schema sits in the readiness stack.

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Two numbers, never summed
How to see AI traffic in analytics

Segment the referrers, catch utm_source=chatgpt.com, and split AI-sourced clicks from AI-influenced customers who arrive looking like direct. Plus the answer-without-click traffic you'll never see in GA4.

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It's mechanics, not malice
Why ChatGPT recommends your competitor

The engine read pages that answered the buyer's question, and they were your competitor's. Which sources get trusted, what training memory adds, and which part of that you can actually change.

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A screenshot isn't a measurement
How often do AI answers change?

Same question, same engine, different day - different answer. Model updates, retrieval freshness, and nondeterminism all move the needle, which is why one-off checks mislead and waves don't.

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Named, not just quoted
Share of voice in AI answers

Citation share tells you how often engines read you. Share of voice tells you how often buyers hear your name. Measuring the second takes a frozen question set and a schedule.

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The category, defined
What is AI Discovery Intelligence

Measuring how AI engines answer real buyer questions, and what moves the counts, as a discipline distinct from search optimisation.

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Publishing next
28 Labs measures how AI engines answer real buyer questions - and what moves the counts. Every number we publish re-derives to specific questions and engines. try28labs.com