AEO vs GEO — Clearing Up the Terminology Confusion

The Terminology Landscape

If you've been researching AI search optimization, you've probably encountered multiple competing terms: GEO, AEO, LLMO, AI SEO, ChatGPT SEO, and others. The terminology landscape is fragmented because the field is new and different players are promoting different labels. Here's what each term means and how they relate.

The Main Terms, Defined

[GEO (Generative Engine Optimization)](/glossary/generative-engine-optimization) — Coined by researchers at Princeton and IIT Delhi in 2023. Focuses on optimizing content for AI-generated search results. The broadest term, encompassing monitoring, content optimization, and brand visibility across all AI search platforms. This has become the most widely adopted term in the industry.

[AEO (Answer Engine Optimization)](/glossary/answer-engine-optimization) — Promoted primarily by Profound (tryprofound.com), the most well-funded player in the space. AEO emphasizes optimizing content to become the preferred answer source for AI and voice-powered search engines. The focus is on direct-answer formatting and structured content.

LLMO (Large Language Model Optimization) — A more technical term that foregrounds the AI model itself rather than the search experience. Used more in technical and AI engineering contexts than in marketing.

AI SEO — A colloquial catch-all that describes any SEO practice adapted for AI search. Less precise than GEO or AEO, but immediately understandable to anyone familiar with SEO.

[LLM SEO](/glossary/llm-seo) / ChatGPT SEO — Variants that refer to optimizing for specific models or platforms. ChatGPT SEO specifically targets ChatGPT's search capabilities.

How the Terms Relate

All of these terms describe overlapping aspects of the same fundamental practice: making brands visible in AI-powered search. The differences are in emphasis and scope:

GEO is the broadest and most inclusive term. It covers everything from content optimization to monitoring to competitive analysis across all AI search platforms. It's platform-agnostic and doesn't assume a specific technology.

AEO overlaps significantly with GEO but has origins in the featured snippet and voice search optimization movement. It emphasizes the "answer" format — structuring content to directly answer questions. AEO tends to be more narrowly focused on content formatting than the broader scope of GEO.

LLMO is the most technically precise. It specifically refers to optimization for Large Language Models, which is the technology powering AI search. It's less commonly used in marketing contexts.

AI SEO and LLM SEO are informal terms that describe the same general practice. They're useful for communication but less precisely defined.

Which Term Should You Use?

For most marketing professionals and business contexts, GEO is the recommended term. It's the most widely adopted, the most precisely defined (thanks to the original research paper), and it encompasses the full scope of AI search visibility optimization.

If you're communicating with C-suite stakeholders who may not be familiar with the space, "AI search optimization" or "AI search visibility" are plain-language alternatives that require no explanation.

If you're working with Profound or within their ecosystem, AEO is their preferred terminology and aligns with their product language.

The important thing is not which term you use but that you recognize they all describe the same general shift: optimizing for AI-generated answers rather than ranked link lists.

For a full comparison of how GEO relates to traditional SEO, see GEO vs SEO: What's Different and What Stays the Same.

Why the Terminology Fragmentation Exists

New technology fields always experience terminology fragmentation. When SEO first emerged, it competed with terms like "search engine marketing," "search engine positioning," "web positioning," and others before SEO became the standard.

The GEO/AEO fragmentation is compounded by commercial interests. Companies promote the terms they've built their branding around. Profound promotes AEO because they've built Profound around that term. Other platforms use GEO. Marketing agencies coin variations to differentiate their service offerings.

Over the next one to two years, expect consolidation. The most likely outcome, based on current adoption trends, is that GEO becomes the dominant umbrella term while AEO remains used in specific contexts.

For the complete guide to the discipline, see The Complete GEO Guide.