SEO vs AEO vs GEO: What They Mean and Which One Your Business Needs

If you work in or around digital marketing, you have probably noticed a growing alphabet soup of acronyms: SEO, AEO, GEO, and sometimes AIO or GSO thrown in for good measure. It is confusing, and most of the content explaining these terms is written for SEO professionals, not business owners.

Here is the simple version. SEO is about ranking on Google. AEO is about getting cited by AI assistants like ChatGPT and Perplexity. GEO is about appearing in Google’s AI-generated answers at the top of search results.

All three affect how customers find your business. The question is which ones matter for you, whether you need to do anything differently, and how much of what you are already doing still applies.

This guide explains each one in plain English, compares them side by side, and helps you decide where to focus your time and budget.

What Is SEO? (The Foundation)

SEO (search engine optimisation) is the practice of improving your website so it ranks higher in Google’s organic (unpaid) search results. When someone searches “plumber near me” or “best engagement rings Australia,” SEO determines which websites appear on page one.

SEO has been around for over two decades and covers three main areas:

• On-page SEO. Optimising your page content, headings, meta titles, and internal links so Google understands what each page is about and considers it relevant to specific search queries.
• Technical SEO. Making sure your website is fast, mobile-friendly, crawlable, and free of errors that prevent Google from indexing your pages properly.
• Off-page SEO. Building your website’s authority through backlinks from other reputable sites, local citations, and your overall online reputation.

SEO is the foundation of all search visibility. Without it, neither AEO nor GEO will work for you, because both depend on having a technically sound, authoritative, well-structured website in the first place.

What Is AEO? (Answer Engine Optimisation)

AEO stands for Answer Engine Optimisation. It is the practice of optimising your content so it gets selected as a direct answer by AI-powered platforms like ChatGPT, Perplexity, Claude, and voice assistants like Siri and Alexa.

When someone asks ChatGPT “who are the best jewellers in Melbourne?” or asks Perplexity “how much does a kitchen renovation cost in Sydney?”, the AI reads content from across the web and generates an answer. AEO is about making sure your business is one of the sources it references.

How AEO Differs from SEO

• SEO gets you ranked. Your website appears as a link in a list of results. The user clicks through to your site.
• AEO gets you cited. Your content is pulled into an AI-generated answer. The user may never visit your site, but your brand is mentioned and sometimes linked as a source.

The key difference is that AI answer engines do not rank pages in order. They synthesise information from multiple sources into a single answer. Your content needs to be structured, clear, and authoritative enough to be selected as one of those sources.

How Big Is AEO?

According to research by Adobe, 77% of Americans who use ChatGPT treat it as a search engine. Similarweb data shows ChatGPT alone now receives over 5 billion monthly visits. Perplexity, Claude, and other AI assistants add further volume on top of that.

This is not a future trend. People are already using AI assistants to find businesses, compare services, and make purchasing decisions. If your business is not showing up in those answers, your competitors may be.

What Is GEO? (Generative Engine Optimisation)

GEO stands for Generative Engine Optimisation. It specifically refers to optimising your content so it gets cited in Google’s AI Overviews, the AI-generated summaries that now appear at the top of many Google search results.

When you search for something on Google, you may notice a block of AI-generated text above the traditional blue links. That block is an AI Overview, and it is powered by Google’s Gemini AI model. GEO is about getting your website cited as a source within that block.

How GEO Differs from SEO and AEO

• SEO gets you into the organic results below the AI Overview.
• AEO gets you cited by third-party AI platforms (ChatGPT, Perplexity).
• GEO gets you cited within Google’s own AI-generated answer, which appears above everything else.

GEO matters because AI Overviews are changing click behaviour. Research from Seer Interactive, analysing over 25 million impressions, found that organic click-through rates dropped 61% for queries where an AI Overview appeared. If Google is answering the question before anyone clicks, being cited in that answer is the new top position.

SEO vs AEO vs GEO: Side-by-Side Comparison

	SEO	AEO	GEO
What it stands for	Search Engine Optimisation	Answer Engine Optimisation	Generative Engine Optimisation
Where you appear	Google organic results (blue links)	ChatGPT, Perplexity, Claude, voice assistants	Google AI Overviews (above organic results)
How it works	Rank higher in search results through content, technical, and authority signals	Get selected as a source for AI-generated answers on third-party platforms	Get cited in Google’s AI-generated summaries at the top of search results
User action	User clicks through to your website	User sees your brand cited in an AI answer (may or may not click)	User sees your brand cited in Google’s AI Overview (may or may not click)
Key ranking factors	Keywords, backlinks, technical health, content quality, E-E-A-T	Entity authority, structured content, factual accuracy, schema markup	Content freshness, topical authority, structured data, citation-worthiness
Maturity	Established (20+ years)	Emerging (2–3 years)	New (1–2 years)
Still needed?	Yes — the foundation for everything	Yes — growing as AI search adoption rises	Yes — critical as AI Overviews expand

What SEO, AEO, and GEO Have in Common

Despite the different acronyms, the good news is that roughly 60–70% of the work overlaps. If you are already doing strong SEO, you are closer to AEO and GEO readiness than you think.

All three reward:

• Clear, well-structured content. Content organised with logical headings, short paragraphs, and direct answers to specific questions.
• Topical authority. Having deep, comprehensive coverage of your area of expertise, not just a single page but multiple related pages that demonstrate genuine knowledge.
• Technical soundness. A fast, mobile-friendly website with proper schema markup, clean code, and no crawl errors.
• Trust and reputation. Positive reviews, backlinks from reputable sources, consistent NAP (name, address, phone) across directories, and a strong Google Business Profile.
• Freshness. Regularly updated content signals to both search engines and AI systems that your information is current and reliable.

The main difference is in the output: SEO gets you a ranking position, AEO gets you a mention in an AI answer, and GEO gets you a citation in Google’s AI Overview. But the inputs that make you competitive in all three are largely the same.

Which One Does Your Business Need?

Every Business Needs SEO

This is non-negotiable. SEO is still the foundation of all search visibility. Without proper technical SEO, keyword-targeted content, and a well-structured website, neither AEO nor GEO will help you. Google’s organic results still drive the majority of website traffic, and they are still how most people find businesses online.

According to StatCounter data, Google still processes approximately 89–90% of all global search queries. It has dipped below 90% for the first time since 2015, but it remains overwhelmingly dominant. SEO is not going anywhere.

AEO Matters If Your Customers Use AI Assistants

If your target audience skews younger, is tech-savvy, or operates in industries where people research before purchasing (professional services, health, legal, financial, B2B), AEO is increasingly important. People are asking ChatGPT and Perplexity questions like:

• “Who are the best accountants in Brisbane?”
• “What should I look for in a web designer?”
• “Compare SEO agencies in Melbourne.”

If your business is the answer to those questions, AEO is how you get there.

GEO Matters If AI Overviews Appear for Your Keywords

AI Overviews now appear on approximately 48% of all tracked Google searches, and that number is growing. For informational and research-based queries, the percentage is even higher. Search Engine Land reported that when an AI Overview appears, organic click-through rates drop significantly. If your business relies on informational content to attract customers (blogs, guides, educational pages), GEO is critical to maintaining visibility.

The Practical Answer for Most Businesses

For most Australian small and medium businesses, the priority order is:

1. SEO first. Build the foundation. Without it, nothing else works.
2. GEO second. If AI Overviews are appearing for your target keywords, optimise to be cited in them. This is an extension of good SEO, not a replacement for it.
3. AEO third. As AI search adoption grows, ensure your content is structured to be selected by AI assistants. This becomes more important over time.

The businesses that will be best positioned in 2026 and beyond are the ones investing in all three, because the overlap is significant and the incremental effort for AEO and GEO on top of strong SEO is relatively small.

How to Optimise for SEO, AEO, and GEO Together

You do not need three separate strategies. Here are practical steps that improve your visibility across all three.

1. Answer questions directly. Structure your content to clearly and concisely answer the questions your customers ask. Use the question as a heading (H2 or H3) and provide a direct answer in the first sentence or two before expanding on the detail. This helps SEO (featured snippets), AEO (AI answer selection), and GEO (AI Overview citation).
2. Build topical authority. Do not write one page about a topic. Cover it across multiple pages with different angles, then link them together. This signals depth of expertise to Google, ChatGPT, and AI Overviews alike.
3. Use schema markup. Implement FAQ schema, local business schema, product schema, and organisation schema where relevant. Structured data helps all systems understand your content.
4. Keep content fresh. AI systems favour recently updated content. Review and update your key pages at least quarterly. Add new data, remove outdated information, and update dates.
5. Build your entity. Make sure your business has a consistent presence across your website, Google Business Profile, directories, social media, and industry publications. AI systems use entity recognition to determine authority.
6. Earn quality backlinks. Links from reputable sites signal trust to Google and to AI systems. Digital PR, industry associations, and local media coverage all help.
7. Structure content for scanning. Use clear headings, bullet points, numbered lists, and short paragraphs. Both search engines and AI models extract information more easily from well-structured content.

Need Help Navigating the New Search Landscape?

Search is evolving fast, but the fundamentals still matter. If you want to understand how SEO, AEO, and GEO apply to your specific business, or you need a strategy that covers all three, contact us for a conversation about where your visibility stands today and where it needs to go.

Already investing in SEO and want to extend into AI search? Learn about our AI SEO & GEO services.

Frequently Asked Questions

What is the difference between SEO, AEO, and GEO?

SEO (search engine optimisation) focuses on ranking your website in Google’s organic search results. AEO (answer engine optimisation) focuses on getting your content cited by AI assistants like ChatGPT and Perplexity. GEO (generative engine optimisation) focuses on getting cited in Google’s AI Overviews, the AI-generated answers that appear at the top of search results. All three aim to increase your visibility, but through different channels.

Is SEO still important in 2026?

Yes. According to StatCounter, Google still processes approximately 89–90% of all global search queries. SEO is the foundation that makes both AEO and GEO possible. Without proper technical SEO, keyword-targeted content, and a well-structured website, your content will not be selected by AI systems either. SEO is evolving, not dying.

What is AEO in marketing?

AEO stands for answer engine optimisation. In marketing, it refers to the practice of structuring your content so it gets selected and cited by AI-powered search tools like ChatGPT, Perplexity, and voice assistants. Unlike SEO, which aims for a ranking position, AEO aims for your content to be the answer an AI system provides when a user asks a question about your industry, product, or service.

What is GEO and how is it different from SEO?

GEO (generative engine optimisation) is specifically about optimising for Google’s AI Overviews. While SEO gets your website into the organic results below the AI Overview, GEO gets your content cited within the AI-generated answer itself. GEO requires strong topical authority, fresh content, structured data, and content that directly answers search queries.

Do I need to do SEO, AEO, and GEO separately?

No. Roughly 60-70% of the work overlaps. Strong SEO, including quality content, technical soundness, schema markup, and topical authority, is the foundation for both AEO and GEO. The incremental effort for AEO and GEO on top of solid SEO is relatively small: structuring content to answer questions directly, keeping content fresh, and building entity authority across platforms.

Which should I invest in first: SEO, AEO, or GEO?

SEO first, always. It is the foundation that makes everything else work. Once your SEO is strong, GEO is typically the next priority because AI Overviews are already appearing on nearly half of Google searches. AEO becomes increasingly important as more people use AI assistants for search, but it builds on the same foundation as SEO and GEO.

How do AI Overviews affect my website traffic?

When an AI Overview appears for a search query, fewer people click through to the websites listed below it. Research from Seer Interactive found that organic click-through rates dropped by 61% for queries with AI Overviews. However, businesses that are cited within the AI Overview gain prominent visibility at the very top of the results page. GEO is the practice of optimising to be one of those cited sources.

What does AEO stand for?

AEO stands for Answer Engine Optimisation. It is sometimes also called Ask Engine Optimisation. It refers to optimising your content for AI-powered answer platforms like ChatGPT, Perplexity, Claude, and voice assistants, where the goal is to be cited as a source rather than to rank in a traditional list of search results.