The RankControl Glossary

The full glossary entry for AEO: what it means, where the term came from, the two-stage mechanics behind AI citations, core practices, myths, and measurement.

AEO vs GEO in plain terms: answer engine optimization aims to be the answer, generative engine optimization aims to be cited inside one. We checked how ChatGPT and Google AI Mode define them, what Google says, and how US search demand for each term changed over the past year.

What agentic commerce is in plain terms, how OpenAI's and Google's shopping protocols work, and what we saw when we ran 16 shopping questions through ChatGPT and Google AI Mode on October 19, 2026.

What an AI citation engine is, how ChatGPT, Perplexity and Google decide which pages to cite, why most pages they read never get cited, and how to measure it.

The definition, the four metrics that compose it, how to measure it across seven engines, and the levers that actually move it. The glossary entry, done right.

What is GEO in digital marketing? It now usually means generative engine optimization, not geo-targeting: what it covers, where it came from, how to start.

The disambiguation the industry owes you: five overlapping acronyms, one practice, two genuinely different meanings of AIO, and which words to use when.

Perplexity is the citation-first answer engine. What it is, how its retrieval works, what it rewards, and how to earn a place in its answers.

Semantic search matches what you mean, not only the words you type. We searched 14 pairs of same-meaning queries on Google and ChatGPT on October 19, 2026, and ran three open embedding models, to show what that means for SEO and AI answers.

What is SEO for ChatGPT called? GEO, AEO, LLMO and AI search optimization compared: what each means, what Google and Microsoft call it, and which name to use.

An SEO MCP server lets Claude or ChatGPT read your SEO data and act on it. What one is, the read and write kinds, how to connect one, and the risks to check.