# Vizelo.ai — GEO & AI search glossary
# Source: https://vizelo.ai/glossary.html
# Last reviewed: 2026-05-26

### // Glossary

# The AI search vocabulary, plain English.

Five terms you need to argue intelligently about discovery in the answer-engine era. No buzzwords, no filler, no consultant-speak.

### // Entries

## Start here.

#### Generative Engine Optimization (GEO)
Making your brand citable inside ChatGPT, Perplexity, Google AI Overviews, Claude, Gemini, and Bing Copilot — not just ranking on Google.
[Read →](what-is-geo.html)

#### Answer Engine Optimization (AEO)
The older, narrower term for optimizing toward direct-answer surfaces like featured snippets, voice assistants, and AI Overviews. GEO's predecessor.
[Read →](what-is-aeo.html)

#### Google AI Overviews
Google's AI-generated answer summaries that sit above the blue links, citing sources inline. The single biggest reason organic CTR cratered in 2025.
[Read →](what-are-ai-overviews.html)

#### Share of Voice (SoV)
The percentage of tracked prompts in your category where an AI engine names or cites your brand. The KPI that replaces keyword rank.
[Read →](what-is-share-of-voice.html)

#### llms.txt
A robots.txt-style plain-text file that points AI engines at your canonical content. Early standard, real adoption, useful even before universal support.
[Read →](what-is-llms-txt.html)

### // Why this exists

## Search didn't die. It got translated.

Every term on this page describes a piece of the same shift: query-and-rank gave way to ask-and-answer. The vocabulary is new because the surface is new. If you're going to operate in it, you should be able to define it in one breath.

## See where you stand in AI search.