SEO vs AEO vs GEO: The Plain-English Difference (and What to Do First)

If you have sat through a pitch in the last year, you have probably been told that SEO is dead and that you need an AEO strategy, a GEO strategy, or both. The underlying shift is real. Search is no longer just ten blue links. But the conclusion that you need to throw away what works is wrong, and expensive.

The simplest way to understand the three terms is by the outcome each one targets.

SEO vs AEO vs GEO: the one-line definitions

You will see the terms used loosely, and some people use AEO and GEO interchangeably. The distinction we find useful in practice is that AEO is about being the source, while GEO is about being represented correctly in the synthesis.

What SEO is, and why it still matters

SEO is the work of earning visibility in traditional search results. The core signals are well understood: relevance to the query, content quality, links and mentions, a crawlable and indexable site, page experience including Core Web Vitals, and clear structure.

SEO matters more, not less, in an AI-heavy world because AI systems retrieve from search indexes. Google's AI Overviews draw on pages in Google's index. ChatGPT search draws on third-party search providers including Bing. Google's own documentation on AI features says that the same SEO best practices apply, and that there are no special requirements beyond them. If your page is not indexed and reasonably ranked, it is rarely in the pool an AI system reads from.

Worked example. A Pune physiotherapy clinic wants to rank for "physiotherapy for frozen shoulder in Pune".

• Before: Title tag "Home | Wellness Clinic". No mention of the condition on the homepage.
• After: A dedicated page titled "Frozen Shoulder Physiotherapy in Pune | [Clinic name]", an H1 that matches, a section on treatment stages, a named physiotherapist with credentials and MedicalClinic markup.

What AEO is: becoming the answer

Answer Engine Optimisation is about making your content the passage a system lifts when it answers a question directly. That system could be Google's AI Overview, a featured snippet, ChatGPT, Perplexity, Claude, Gemini or a voice assistant reading an answer aloud.

AEO adds weight to things classic SEO only partly rewarded:

• Direct answers in the first 40 to 80 words under a heading.
• Question-shaped headings that mirror how people actually ask.
• Structured data such as FAQPage, Article and Organization that removes ambiguity.
• Trust signals such as authorship, review and organisation details that make a source safe to quote.

Worked example. Same clinic, query "how long does frozen shoulder take to heal".

"Frozen shoulder usually progresses through three stages, freezing, frozen and thawing, and commonly takes one to three years to resolve fully without treatment. Physiotherapy can reduce pain and improve range of motion during each stage. Recovery time varies with age, severity and conditions such as diabetes."

That paragraph answers the question in a form an AI Overview or voice assistant can quote. In practice, a qualified clinician should write or review it, because this is health content.

What GEO is: shaping the synthesis

Generative Engine Optimisation is subtler. When an assistant writes "The best options for X are A, B and C" or "Typical costs range from P to Q", it is synthesising from many sources and from what the model already knows. GEO is the work of making sure your brand appears in those lists, with accurate attributes, and that the facts the model reaches for are ones you have published clearly.

GEO tactics tend to be editorial rather than technical:

• Publish the canonical reference in your niche: a methodology, a glossary, a comparison framework or an original dataset others cite.
• Keep your brand facts consistent across your site, directories, review platforms and press. If three sources disagree about what you do, a model may pick the wrong one.
• Earn mentions in the places models learn from, such as trade publications, community discussions and authoritative lists.
• Describe yourself in the language buyers use. If buyers ask for "B2B SEO agency" and your site only says "growth partner", you are harder to match.

Worked example. Ask an assistant: "Which digital marketing agencies in Delhi specialise in B2B?" If your site, LinkedIn page, directory listings and press mentions all consistently say "B2B digital marketing agency in Delhi", you are giving the model a clean, repeated signal. For what it is worth, our own site ranks #1 in Google for "B2b Digital Marketing Agency in India" according to our RankStreet rank tracker, and the consistency of how we describe ourselves is part of the work behind it.

How SEO, AEO and GEO overlap

Most of the work is shared. A page that is well optimised for search is already a long way towards being a good answer source, and the same trust signals help all three.

• Good SEO gets you retrieved, which makes AEO possible.
• Direct-answer writing helps featured snippets (SEO), AI citations (AEO) and accurate summaries (GEO).
• Structured data supports rich results, clearer answers and entity understanding.
• E-E-A-T signals help in all three.

They diverge at the edges. Aggressive link acquisition with little brand substance may still move rankings but does little for how assistants describe you. Liftable answer paragraphs on an otherwise thin page will not rank. GEO asks a strategic question SEO rarely asked: what do we want to be the reference source for?

How to measure each one

RankStreet covers the three in one place: the audit grades SEO fundamentals and AEO friendliness, rank tracking reports positions and share of voice, and the AEO/GEO tracker re-runs your saved prompts across ChatGPT, Claude, Perplexity and Gemini so you can see mention rate over time.

What to invest in first

1. Fix the SEO foundation. Indexing, titles, H1s, internal links, Core Web Vitals and basic schema. Our free website audit guide lists what to check.
2. Layer AEO onto your money pages. Rewrite the opening of each as a direct answer, add genuine FAQs with FAQPage markup, and add authorship. See how to optimise for Google AI Overviews.
3. Make two or three GEO bets. Choose the reference assets your category lacks and publish them properly.
4. Track all three monthly. Rankings, citations and mention rate.

Where this is heading in 2027

Our expectation, framed as a forecast rather than a fact, is that the labels will matter less and the measurement will matter more. Zero-click answers will keep growing for simple informational queries, so traffic alone will under-report your visibility. Multimodal search (photographing a product, asking a question by voice) and AI agents that compare suppliers on a user's behalf will reward the same things: clear facts, consistent entities and pages that machines can parse. Teams that report rankings, citations and AI mentions side by side will understand their visibility; teams that report clicks alone will not.

Three myths worth retiring

• "AEO means writing for robots." The opposite. Direct answers, clear headings and specific facts are what impatient human readers want too.
• "GEO is about tricking the model." Attempts to manipulate AI answers with hidden text or mass-produced pages tend to be filtered as spam. Durable GEO is publishing accurate, consistent, useful information.
• "You need an llms.txt file to be visible." llms.txt is a proposed convention, not a standard that the major assistants have committed to. It is harmless to add, but it is no substitute for crawlable, well-structured pages.

Which one matters most for you?

• Local service businesses: SEO and Google Business Profile still do most of the work. Add FAQs and clear service pages for AEO.
• B2B and SaaS: buyers research with assistants, so AEO and GEO are now part of the job, not extras.
• Commodity or comparison-heavy categories such as insurance, loans and software: GEO is the long game, because generic AI answers decide the shortlist.

Not sure where you stand? Run a free RankStreet audit to see your SEO score and AEO friendliness side by side, or use the free RankStreet Chrome extension to check any page you are viewing.

Frequently asked questions

What is the difference between SEO vs AEO vs GEO?

SEO aims to rank pages in search results. AEO aims to have your content quoted as the answer in AI Overviews, snippets and assistants. GEO aims to shape how generative AI describes your brand and category, whether or not it cites you.

Is AEO replacing SEO?

No. AI answer systems mostly retrieve from search indexes, so pages that do not rank are rarely cited. AEO builds on SEO by adding direct answers, structure and trust signals.

Is GEO the same as AEO?

They overlap heavily and many people use the terms interchangeably. A useful distinction is that AEO focuses on being cited as a source, while GEO focuses on how your brand and facts are represented in AI-generated summaries.

Do I need different content for AEO and GEO?

Mostly not. Clear, well-structured, trustworthy content serves both. GEO adds editorial choices, such as publishing reference material and keeping brand facts consistent across the web.

How do I measure AEO and GEO performance?

Save a set of real buyer prompts and check them regularly across ChatGPT, Claude, Perplexity and Gemini, recording whether your brand is mentioned and whether your URL is cited. An AEO/GEO tracker automates this.