AI検索最適化の用語集
この分野はまだ新しく、名称も定まっていません。以下の用語はすべて実際に使用されており、それぞれ意味と使いどころを解説するページへリンクしています。
このサイトで使用する階層構造: Primary public term: AI Search Optimization · Industry acronym: GEO · Specific outcome: AI Visibility · Technical subset: LLMO · Citation-focused subset: AEO
このカテゴリーをあえて単純な「AI最適化」と呼ばないようにしています。その名称は、AIによる発見に向けたウェブサイトの最適化ではなく、AIモデル・プロンプト・計算コストの最適化を指す場合もあるためです。
| 用語 | 意味 | 推奨用途 |
|---|---|---|
| GEO Generative Engine Optimization |
Improving visibility within responses produced by generative engines. | The strongest broad industry term — use for visibility in ChatGPT, Gemini, Perplexity, Google AI Overviews and similar systems. |
| AEO Answer Engine Optimization |
Getting selected, quoted, or cited in direct answers. | Use when the goal is becoming the answer, citation, or recommendation instead of merely ranking as a blue link. |
| LLMO Large Language Model Optimization |
Making content understandable and retrievable by LLMs. | Use in technical conversations about how models understand, retrieve, and summarize a brand's content. |
| AI Search Optimization | Plain-English umbrella term for optimizing a website for AI-driven search. | The best term for clients and nontechnical audiences — it says exactly what it is. This is the primary public term used across this site. |
| Generative Search Optimization | Optimization for AI-generated search results. | A clear alternative to GEO when you want the words to explain themselves. |
| AI Visibility Optimization | Improving brand mentions and citations in AI answers. | Best when measuring brand exposure rather than website traffic — the outcome term in this site's hierarchy. |
| AI Discovery Optimization | Helping AI systems discover and recommend a company or resource. | A good broader marketing term when the goal is being found and suggested, not just cited. |
| Answer Search Optimization | A hybrid of search and answer optimization. | Less established; prefer AEO or GEO unless the audience already uses it. |
| Conversational Search Optimization | Optimization for natural-language and follow-up searches. | Useful when the focus is conversational interfaces — chat, voice, multi-turn questions. |
| AI Citation Optimization | Increasing the likelihood that AI systems cite the site. | Narrow but highly descriptive — use when citations are the KPI. |
| Machine Readability Optimization | Improving structure, schema, crawlability, and extractability. | Usually a technical subset of the discipline rather than the whole of it. |
| RAG Optimization Retrieval-Augmented Generation |
Making content more retrievable and useful in grounded AI systems. | The developer's term — use in technical contexts about retrieval pipelines. |
Google's own position, worth keeping in view: conventional SEO remains foundational, and Google states there are no special technical requirements unique to appearing in AI Overviews or AI Mode. It refers to terms like AEO and GEO as emerging industry terminology rather than replacements for SEO (developers.google.com/search/docs/appearance/ai-features).
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