The Expanding Vocabulary of Search: How AEO, GEO, and LLMO Fit Into Your SEO Strategy

Search has always been changing. The way we search, the platforms we search on, and the search output. And now, the language we use to describe it.

For decades, it was about typing queries into a box. We searched on Google, Bing, or DuckDuckGo, scanning lists of blue links for the right result. Then came the voice revolution. We started talking to our devices—“Alexa, what’s my morning appointment?” or “Siri, turn on my music”—shifting our behavior from keywords to conversation.

Now, just as you were getting comfortable with SEO (Search Engine Optimization), you may have noticed a new wave of acronyms entering industry conversations: AEO, GEO, LLMO, AIO.

For executives and business leaders, this expansion of terminology can be confusing. It raises a valid question: Do these new terms represent entirely new disciplines requiring separate budgets, or are they part of a larger whole?

I think they can all be grouped under the umbrella of SEO.

Just as SEO sits under the broad umbrella of Digital Marketing, these new terms represent specialized areas of focus within the vast universe of SEO. They describe specific nuances of how modern AI engines interact with content.

Here is a breakdown of what these terms mean, how they relate to the SEO fundamentals you already know, and why a holistic strategy is the best path forward.

The glossary: Get familiar with new terminology in the SEO world

To navigate this new landscape, it helps to understand what each acronym highlights and how it connects back to core SEO principles.

1. AEO (Answer Engine Optimization)

• The concept: This discipline focuses on optimizing content so that AI answer engines like ChatGPT, Claude, and AI chatbots can cite your brand as the direct answer.
• The SEO context: AEO deepens the focus on “Featured Snippets” and “Zero-Click” searches. It emphasizes formatting content into clear, concise answers (Q&A style) so that engines can easily read it aloud (for voice search) or display it prominently at the top of AI-powered results.

2. GEO (Generative Engine Optimization)

• The concept: This refers to optimizing specifically for Generative AI engines like ChatGPT, Perplexity, and Google’s AI Overviews, which synthesize answers rather than just listing links.
• The SEO context: GEO highlights the importance of authority and citations. Since generative AI “learns” from trusted sources, this approach doubles down on ensuring your brand is mentioned in authoritative places, reinforcing your status as a reliable source for the AI to draw from.

3. LLMO (Large Language Model Optimization)

• The concept: This involves strategies to ensure Large Language Models (LLMs) recognize and understand your brand’s entities and attributes.
• The SEO context: This aligns closely with Entity SEO. It is about ensuring your brand name is consistently associated with specific keywords and topics across the web. The goal is that when an LLM predicts the next word in a sentence about your industry, the logical probability points to your brand.

4. AIO (AI Overviews)

• The concept:  Shorthand for Google’s AI Overviews (formerly known as SGE), the generative summaries that now appear at the very top of search results.
• The SEO context: “Optimizing for AIO” means structuring your content so that Google’s Gemini model selects your information to construct its summary. The “position zero” in the AI era.

What’s Google’s stance on various search optimization acronyms?

With these specialized terms gaining traction, it is helpful to look at the guidance from the biggest search engine of them all.

Google’s documentation on AI Overviews (formerly SGE) and insights from their search liaisons emphasize one core principle: High-quality content is still king.

Google encourages creators not to try and reverse-engineer the technicalities of LLMs, but rather to create content that demonstrates E-E-A-T (Experience, Expertise, Authoritativeness, and Trustworthiness).

At WordCamp US in August 2025, Danny Sullivan (Google’s Search Liaison at the time) addressed this directly, reassuring marketers that the fundamentals remain unchanged.

“Good SEO is good GEO, or AEO, AIO, LLM SEO, or LMNOP EO…Don’t panic. What you’ve been doing for search engines and you may have thought of as SEO, is still perfectly fine and is still the things that you should be doing. “ — Danny Sullivan, Google Search Liaison (WordCamp US 2025 Session)

Whether a user finds you via a traditional blue link or an AI-generated summary, the algorithm (and the AI model) looks for similar signals:

1. Is this information accurate?
2. Is the source reputable?
3. Is the answer comprehensive and easy to understand?

When you optimize for these three pillars, you are effectively performing SEO, AEO, GEO, and LLMO simultaneously.

BTW: I hope you didn’t get thrown off by “LMNOP EO”. My first reaction watching that video was “Crap, I’ve never even heard of that one”. I actually googled it. “What is LMNOP?” After seeing video results showing children’s songs about the alphabets, I realized that was a joke. Stupid, right….hey, nobody’s perfect!

Stick with SEO best practices and foundations

While the acronyms help us identify specific goals, the shift in user behavior they describe is the most important takeaway. People are asking more complex questions, and they expect direct, synthesized answers.

Here is how we apply these evolved principles to your strategy:

1. Structure is the universal language

AI models are essentially pattern recognition machines. They thrive on clear structure.

• The AEO approach: Use clear headers, bullet points, and direct answers.
• The SEO foundation: This has always been best practice for readability and crawling.
• The synergy: Structured data (Schema markup) helps both classic crawlers and modern LLMs understand exactly what your content is about, making it easier for them to “read” your site.

2. Be the citation, not just the destination

Generative AI builds answers by synthesizing information from trusted sources. To be included in that synthesis, you need to be recognized as an authority.

• The GEO approach: Focus on getting cited by authoritative publications and industry leaders.
• The SEO foundation: This mirrors Digital PR and Link Building.
• The synergy: In the AI era, mentions (even unlinked ones) on high-authority sites help “teach” the model that you are a market leader, increasing the likelihood of your brand appearing in generative responses.

3. Answer the question first

AI users often seek immediate satisfaction.

• The optimization focus: “Answer-first” formatting.
• The SEO foundation: The “Inverted Pyramid” style of journalism.
• The synergy: State the answer clearly at the top of the page, then expand on the details. This makes it easy for Google to grab that snippet for an AI Overview while still providing depth for the reader.

The verdict: Embrace the evolution

The emergence of terms like AEO and GEO isn’t a sign that SEO is dead; it’s a sign that SEO is growing. These terms help us discuss the specific nuances of optimizing for a machine that can read and write, not just index and rank.

Our recommendation? Adopt a holistic Search Strategy.

We don’t need to view these as competing methodologies. Instead, we integrate the insights from AEO and GEO into our broader SEO work to ensure your content is:

• Technically sound (so bots can access it).
• Authoritative (so models trust it).
• Helpful (so humans engage with it).

By sticking to these fundamentals, you can be sure that no matter what acronym the industry favors next year, your brand remains the best answer.