AEO vs SEO vs GEO: What Each One Does and Which Your Business Needs

The debate about AEO vs SEO usually starts with a worry: if people ask ChatGPT instead of Google, is SEO wasted money? Then a third acronym, GEO, shows up in a proposal, and it becomes hard to tell which work is new and which is the same work under a new name.

The honest answer is less dramatic than most headlines. The three disciplines aim at different places on the results page and in AI tools, but they are built on the same pages, the same technical setup and the same facts about your business. GoSocial optimizes websites for traditional search, answer engines and generative AI search on one foundation, and this guide walks through how we explain the difference to clients across the US.

What is SEO, and what does it still do?

Search engine optimization (SEO) is the work of making a website easy for search engines to crawl, understand and rank, so the right pages show up when people search for what you sell. Its classic output is a blue link on a results page, and its classic measures are rankings, impressions, clicks and the leads those clicks produce.

SEO covers three layers:

• Technical: pages that load fast on a phone, return clean status codes, sit in a sitemap and are not blocked from crawling or indexing.
• On-page: one clear topic per page, a title and headings that match what people search, useful text and descriptive internal links.
• Authority: other relevant sites mentioning and linking to you, plus consistent business details across the web.

None of that became obsolete when AI answers arrived. Google states that the same SEO best practices apply to its AI features, and that a page must be indexed and eligible to show a snippet before it can appear as a supporting link in AI Overviews or AI Mode. If a page cannot rank, it is rarely the page an AI answer chooses to cite.

What is AEO (answer engine optimization)?

Answer engine optimization (AEO) is the practice of structuring content so a search engine or voice assistant can take one passage from your page and present it as the direct answer to a question. The target is not a ranking position but the answer slot: a featured snippet, a “People also ask” box, or the sentence a voice assistant reads aloud.

The difference in AEO vs SEO is mostly about the unit of work. SEO thinks in pages; AEO thinks in questions and the paragraph that answers each one. A page can rank on the first page and still never be used as an answer, because the answer is buried in the fourth paragraph after a long introduction.

What AEO looks like on a real page:

• The answer first. A 40 to 60 word reply right under the question, before the nuance.
• Questions as headings. H2s and H3s phrased the way customers ask, so each section can stand on its own.
• Lists and tables for steps, comparisons and options, which engines can lift cleanly.
• An FAQ built from real questions taken from “People also ask” and search suggestions, not invented ones.

There is one limit worth knowing. Google’s documentation on featured snippets is direct about it: you cannot mark up a page to become a featured snippet. Google’s systems decide. AEO improves the odds by making the answer easy to find and easy to quote; it does not switch anything on.

What is GEO (generative engine optimization)?

Generative engine optimization (GEO) is the work of making your business easy for AI tools to find, trust and cite when they write an answer from several sources. ChatGPT search, Perplexity, Gemini, Claude and Google AI Overviews all assemble a written response and, in most cases, show the pages they drew on. GEO is about being one of those pages, and about the AI describing your business correctly.

The term comes from research. A 2023 paper from Princeton and collaborators, “GEO: Generative Engine Optimization”, later published at KDD 2024, describes generative engines as search engines that use generative models to gather and summarize information. In the authors’ benchmark, adjustments such as adding citations, quotations and statistics improved a source’s visibility in generated answers by up to 40%, with results varying by domain.

In practice, GEO adds a few things on top of SEO and AEO:

• Clear entity statements. Who you are, what you do and where you work, said in plain words and said the same way on every page.
• Quotable passages. Two to four sentences that make sense out of context, carry a fact, and can be lifted into an answer without editing.
• Sources and dates. Statistics with the name of the source and the year, and a visible “last updated” date.
• Readable by AI crawlers. The search crawlers used by AI tools are allowed in robots.txt, and the main content is in the HTML, not only injected by scripts.
• Mentions beyond your site. Directories, associations, reviews and press that describe your business consistently.

You will also see the same idea called AIO (AI optimization) or LLMO (large language model optimization). The names differ; the work is largely the same. If you want to see how this applies to your own pages, a Blueprint Briefing is a short call where we look at what your site has to produce and how it shows up today.

AEO vs SEO vs GEO: side-by-side comparison

Read the table by row, not by column. Every row in the GEO column depends on the SEO column being healthy first: an AI tool can only cite a page it can find, read and trust.

How do SEO, AEO and GEO overlap?

Think of the three as layers rather than rivals. SEO is the base: crawlable pages, a clear structure and authority. AEO sits on top and shapes each page so its answers are easy to extract. GEO sits on both and makes the business itself, not only the page, easy to recognize, verify and cite.

Most of the work serves all three at once. A service page that answers “how much does this depend on” in its first lines, uses question headings, states who the company is and where it works, and loads fast on a phone is doing SEO, AEO and GEO in the same edit. That is why paying for three separate programs that each rewrite the same pages rarely makes sense.

An AI answer can only cite a page it can crawl, read and trust, which is why SEO stays the foundation for both AEO and GEO.

Where they truly differ is in emphasis and measurement:

• SEO cares most about which page ranks for which query, and about avoiding two pages competing for the same search.
• AEO cares most about the first sentences under each question and whether they answer it completely.
• GEO cares most about consistency: the same business name, services, service area and contact details on your site, in your structured data and on the profiles that mention you.

What doesn’t help, according to Google

A lot of advice about AI search sells new files, new markup and new tools. Google’s own guide, AI features and your website, is unusually plain on this point. It says there are no additional requirements or special optimizations needed to appear in AI Overviews or AI Mode, and that you do not need new machine-readable files, AI text files or special schema markup for them.

The same guide explains how the features pick sources. Both AI Overviews and AI Mode may use a technique Google calls query fan-out: they run several related searches across subtopics to build one response, which can surface a wider set of pages than a classic results page. For a business, that is an argument for covering the real sub-questions of a topic (cost drivers, process, comparisons, who it is for) instead of writing one thin page per keyword.

Three practical takeaways from Google’s guidance:

• Fundamentals still decide eligibility. Crawling allowed, internal links, good page experience and important content in text form.
• Structured data must match the visible page. Markup that describes things the visitor cannot see is a risk, not a shortcut.
• Traffic from AI features is reported with normal search. Google includes it in the Search Console Performance report under the “Web” search type, so there is no separate AI report to wait for.

Files such as llms.txt can still be useful for other AI tools, and we add one for clients who want it, but they are optional and Google says it does not need them. If a proposal makes them the center of an AI search plan, ask what the rest of the plan is.

If you are weighing a proposal like that right now, book a Blueprint Briefing and bring it along. We will tell you which parts are fundamentals and which parts are packaging.

Can AI engines read your website?

GEO fails quietly when an AI tool is not allowed to read your site. Several AI companies run more than one crawler, and they do different jobs, so blocking “AI bots” in one line can remove you from AI search results without anyone noticing.

OpenAI’s crawler documentation is a good example of the split:

• OAI-SearchBot is used to surface websites in ChatGPT’s search features. OpenAI states that sites opted out of it will not be shown in ChatGPT search answers.
• GPTBot collects content that may be used to train OpenAI’s models. Blocking it is a training decision and, per OpenAI, each setting is independent.
• ChatGPT-User fetches a page when a person asks ChatGPT about it; it is not used to decide what appears in search.

Perplexity documents a similar split between PerplexityBot, which surfaces sites in its answers, and Perplexity-User, which fetches pages on request. On Google’s side, Googlebot handles Search and its AI features, while the separate Google-Extended setting controls use of your content for some other Google AI systems.

The practical rule: decide on purpose. Most businesses that want to be cited allow the search crawlers of the AI tools their customers use, and then decide separately how they feel about training crawlers. Also check your firewall or security plugin, since some block unfamiliar crawlers even when robots.txt allows them.

How to do SEO, AEO and GEO on one website

Here is the order we follow when a site needs all three. Each step builds on the previous one, and none of them requires a separate tool stack.

1. Fix what blocks crawling and indexing. Sitemap, robots.txt, status codes, redirects, mobile speed and duplicate pages. If search engines cannot read a page, nothing else on this list matters.
2. Give every keyword one owner. Map each important search to a single page, so your service page and a blog post are not competing for the same query.
3. Rewrite openings to answer first. Under each main heading, put the direct answer in the first two or three sentences, then the detail.
4. Turn headings into the questions customers ask. Use “People also ask”, search suggestions and the questions your team hears on sales calls.
5. State the entity plainly. Business name, what you sell, who you serve and where, written the same way on the home page, service pages, contact page and in the structured data.
6. Add structured data that matches the page. Organization or LocalBusiness, breadcrumbs, articles and FAQs only where the content is visible to the reader.
7. Write quotable passages with sources. Short, fact-dense sentences that can be lifted into an answer, with the source and year for every statistic.
8. Allow the AI search crawlers you want. Review robots.txt and firewall rules, as described above.
9. Earn mentions outside your site. Accurate business profiles, industry directories, associations and partners describing you consistently.
10. Measure, then repeat. Track what changed and adjust the pages that are close to working before writing new ones.

Steps 1, 2 and 6 are development decisions, which is why they are cheapest to get right during a build or a redesign. If you are planning a new site, read how we approach custom and WordPress web development and how platform choice affects this work in our guide to custom website vs WordPress.

How do you measure AEO and GEO?

SEO has mature measurement. AEO and GEO are still messier, and anyone who shows you a precise “AI visibility score” should explain exactly how it was calculated. Here is what can be measured honestly today:

• Search Console: clicks, impressions and average position by query and page. Since Google reports AI Overviews and AI Mode traffic inside normal search data, this remains the main source for Google.
• Analytics referrals: visits that arrive from AI tools such as ChatGPT or Perplexity show up as referral traffic in GA4 when the tool passes a referrer. Not every visit does, so treat the number as a floor, not a total.
• Manual citation checks: a fixed list of your most important questions, asked in the same AI tools on a regular schedule, recording only what you actually see: the query, the tool, the date, and whether you were cited.
• Business outcomes: form submissions, phone clicks, WhatsApp clicks and bookings, tied back to the pages that produced them.

Every GoSocial website launches with GA4 and Google Search Console connected and tracks form submissions, phone clicks, WhatsApp clicks and bookings. We do not promise a ranking, a score or an AI citation, because no one can guarantee those; we build for the signals and show you the measurements.

AEO vs SEO vs GEO: which one does your business need?

Almost every business needs the SEO base, because without it the other two have nothing to stand on. The question is where to put extra effort, and that depends on how your customers search.

• Service businesses that live on calls and quote requests (contractors, clinics, agencies, professional services): SEO on service pages first, then AEO on the questions customers ask before they call, such as cost drivers, process and timelines in general terms.
• Businesses that sell expertise or a considered purchase (consulting, software, high-ticket services): AEO and GEO deserve more weight, because buyers ask AI tools to compare options and explain trade-offs before they ever visit a website.
• Real estate agents and loan officers: clients research neighborhoods, programs and steps long before they pick a professional, so question-led content plus a consistent professional profile matters. We cover that setup on our page about real estate websites for agents and loan officers.
• Businesses running paid campaigns: focused landing pages can serve both the campaign and the organic questions around it, as long as each one answers a single intent. You can see examples of how we structure pages in our web design portfolio.

If you already work with someone on search, a useful test is to ask them to show you, page by page, which work serves SEO, which serves AEO and which serves GEO. The answer should mostly be the same pages. For how we run all three together, see our SEO, AEO and GEO services page, or browse the full list of web design and search services.

Want a direct read on where your site stands? Book a Blueprint Briefing and we will walk through your pages, your search data and the questions your customers are asking AI tools.