What’s the difference between SEO, AEO and GEO? And how do you use them?

SEO focuses on helping your pages rank in traditional search results and win clicks. AEO makes your content the clear, extractable answer for snippets and voice assistants. GEO ensures your most authoritative, well‑sourced content is trusted and cited inside AI‑generated overviews and answers. Used together, they help you rank better, answer better and be referenced across more search, voice and AI experiences.

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Search ain’t what it used to be. “10 blue links” on a results page is so last year.

Now, people type queries into Google, ask questions out loud to their phones or smart speakers, and increasingly turn to AI tools that summarise entire topics in just a few paragraphs. In this world, three overlapping practices have emerged: SEO, AEO and GEO. These techniques decide what you see, what you hear and just how visible your brands and businesses are.

Even without live access to external data, we know from recent industry studies that Google still commands the vast majority of global search. However, voice usage and generative AI search are both growing fast. Traditional search is still where most discovery starts, but more journeys are now mediated by voice assistants and AI-generated summaries

Which is all good to know. But what actually distinguishes SEO, AEO and GEO – and how can you shape these techniques to best support your business?

Let's take a closer look.

What is SEO?

Search Engine Optimisation (SEO) has been around for years and it can ensure your content appears prominently in organic search results, especially on Google. The goal is simple: Earn visibility, clicks and ultimately revenue from people who are actively looking for what you do.

Core SEO work focuses on:

• Making pages relevant to specific topics or queries (through keywords, headings, internal links and clear structure)

  
  

• Ensuring your site is technically sound so search engines can crawl and index it

  
  

• Building authority and trust, often via links and mentions from other reputable sites

  
  

Research shows that Google continues to process trillions of searches per year and accounts for well over 80% of the global search market, with alternative engines such as Bing capturing a small but steady share. As long as that remains true, SEO will continue to be the foundation of organic visibility:

The takeaway: If you can’t easily be found in traditional results, you’re starting from a weak position.

What is AEO?

Answer Engine Optimisation (AEO) reflects a different user expectation: People increasingly want a direct answer, not a list of options. On a results page, AEO shows its hand as featured snippets, “People also ask” boxes and other elements where a clear, concise answer is pulled out and highlighted above the usual listings. On voice, it’s even starker – a phone or smart speaker often reads out a single answer from a single source.

AEO focuses on making your content the one that gets selected.

This means:

• Writing headings that match real questions people really ask

  
  

• Providing short, precise answers directly under those headings, then adding supporting detail

  
  

• Using structured data (for example FAQ and Schema markup) so search engines and assistants can easily understand the relationship between questions and answers

  
  

• Gaming the system with a ‘quick answer block’ at the start of every piece of content (like you see at the beginning of this article). The quick answer gives the AI all the facts that answer a user’s common question – essentially a script that AI can re-use in it’s Overview

  
  

Industry surveys and usage studies indicate that a majority of online users engage with voice search regularly, and that billions of voice assistant instances are now used across smartphones, smart speakers, cars and other devices.

Analysts also note that local look‑ups (“near me”, “open now”) and quick factual questions form a substantial portion of these interactions – exactly the kind of things that get answered by a single snippet or spoken response.

The takeaway: If your content doesn’t present a clear, extractable answer, someone else’s does. You might still rank on page one, but the AI will probably focus on a competitor.

What is GEO?

Generative Engine Optimisation (GEO) is newer and less widely understood. It’s about visibility inside generative AI systems such as ChatGPT, Gemini, Perplexity and the AI‑powered results that are now embedded in search products (like Google’s AI Overviews). The user asks a question, the system reads a range of sources and then produces a multi‑paragraph answer in natural language. Sometimes it shows citations and links; sometimes the sources are less visible.

GEO poses a simple question for businesses: When that AI answer is generated, does your content feature as a trusted, quotable source? If it doesn't, you're losing out.

To improve your chances of appearing, you need content that LLMs can rely on:

• Clearly structured, with headings and sections that map to distinct sub‑topics

  
  

• Evidence‑based, with data, examples and explicit references to underlying research or official sources

  
  

• Original in analysis or data, rather than just echoing what every other site says

  
  

Recent analyses of traffic and usage data suggest that, while generative AI tools are attracting huge interest, their “search‑like” activity is still a small fraction of classic search volume. One widely cited piece of research estimated that Google handled hundreds of times more searches than ChatGPT, even under generous assumptions. At the same time, search platforms are weaving generative answers directly into results, and analytics firms tracking “AI search” behaviour report strong growth in visits to these AI‑enriched experiences.

The takeaway: Even if AI search volumes are modest compared with traditional search, they’re highly influential touchpoints - especially for longer, more exploratory queries where users want synthesis, not just links.

The differences at a glance:

Dimension	SEO (Search Engine Optimisation)	AEO (Answer Engine Optimisation)	GEO (Generative Engine Optimisation)
Primary goal	Rank organic listings on SERPs and drive traffic	Win direct/voice answers in snippets and assistants	Earn trust and citations in AI‑generated answers
Main surface	Classic search result pages (Google, Bing, etc.)	Featured snippets, “People Also Ask,” voice responses	AI overviews in search, chatbots, AI search experiences
Output format	List of links with snippets	One concise answer, often read aloud	Multi‑paragraph, conversational summaries that may mention or cite sources
Best for	Product pages, category pages, evergreen guides, blogs	FAQs, how‑tos, local queries, conversational questions	Thought leadership, technical content, data‑driven insights
Key success metric	Organic traffic, rankings, conversions	Snippet share, voice answer frequency, answer impressions	Frequency and prominence of citations or mentions in AI outputs

Why the differences matter

If SEO focuses on ranking pages, AEO on delivering direct answers, and GEO on becoming a cited authority in AI‑generated content, do you actually need to treat them separately? Well, in practice, you can’t ignore any of them.

Here’s why:

• Traditional search still dominates discovery. The overwhelming majority of search‑like activity still runs through platforms such as Google. If you neglect SEO, you surrender the main route by which people find information, products and services

  
  

• Answer experiences redirect attention. When Google or a voice assistant surfaces a concise answer at the top, it often satisfies the query immediately. That’s powerful if it’s your answer – and a problem if it belongs to a rival

  
  

• AI summaries shape perception. When users ask broad or complex questions in AI tools, those generated answers act like a curated overview of “what’s true” on a topic. If your brand never appears in those overviews, you risk being invisible in the conversations that matter most.

  
  

Crucially, the same piece of content can - and should - work across all three environments. For example, a well‑structured, in‑depth guide could:

• Rank well for relevant queries

  
  

• Contain clear, short answer blocks that are eligible for snippets and voice responses

  
  

• Offer original insights and data, with cited sources, that AI systems find safe to quote

  
  

So what should you do differently?

Rather than treating SEO, AEO and GEO as rigid categories, it’s more useful to treat them as design constraints for good content.

When planning pages and articles, ask:

• Can a search engine clearly see what this content is about and why it’s more useful than competing pages?

  
  

• Have we explicitly answered the obvious questions in one or two tight sentences, right where the reader expects them?

  
  

• Is there anything here that qualifies as an original contribution - data, analysis, a framework - that an AI system might want to reference?

  
  

For most organisations, the priority is still to get the SEO basics right and build a consistent flow of organic traffic. From there, you can refine content structures for answer experiences, and gradually invest in deeper, better‑sourced material that’s attractive to generative AI.

Final word:

The label on the work matters less than the outcome: This means being discoverable in search results, being selected when only one answer is read out, and being trusted when AI tools assemble the bigger picture for your audience.

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