AI visibility glossary

Plain definitions for the vocabulary of AI search visibility — what each term means, how it is measured, and where the numbers come from. The category has not settled on one name yet, which is why the same idea appears as GEO, AEO, LLM SEO, and AI SEO depending on who is writing.

Terms

• Generative engine optimization (GEO) — improving how a brand appears in AI-generated answers.
• AI search visibility — how often and how prominently a brand appears in AI answers.
• AI share of voice — the percentage of AI answers in a category that name your brand.
• ChatGPT citations — the linked sources ChatGPT attaches when it retrieves live results.
• AI visibility score — a composite measure of appearance across engines.

Why does the terminology keep changing?

Because the practice is younger than its vocabulary. "AI visibility" is currently the phrase gaining ground, while "generative engine optimization" has been losing search interest since late 2025. The underlying job is the same in every case: getting named inside the answer rather than ranked in a list of links. The distinction from traditional search is covered in GEO vs SEO.

How are these terms measured in practice?

By running a category's real buyer questions across ChatGPT, Gemini, and Claude and recording which brands each engine names. Two findings shape how the numbers should be read: 30.1% of answers in our 2,994-probe July 2026 study cited zero sources, meaning the engine answered from memory rather than the live web; and two engine presets asked identical questions agreed on category winners only 22% of the time. Both are why a single number, taken from a single check, is unreliable. See how AnswerMonk measures AI visibility.

Frequently asked questions

Is GEO the same as AEO or LLM SEO?

In practice, yes — generative engine optimization, answer engine optimization, and LLM SEO all describe improving how a brand appears inside AI-generated answers. The terms emerged in parallel from different corners of the industry, and none has fully won.

What does AnswerMonk mean by appearance rate?

Appearance rate is the share of a category's buyer prompts in which a brand is named, measured across ChatGPT, Gemini, and Claude. It is AnswerMonk's implementation of AI share of voice, reported as a rate across a prompt panel rather than as a single score.

Where can I see these terms applied to a real brand?

Published example reports live at answermonk.ai/reports, and a free audit of your own brand takes 3-8 minutes with no signup.

Run a free AI visibility audit for your brand at answermonk.ai