SEO vs GEO vs AEO: What's Actually Different
· Cole Stark · 8 min read
SEO vs GEO vs AEO is mostly a difference in where you want to show up. SEO gets your pages ranking in search results. AEO gets your content picked as the direct answer to a question. GEO gets your brand cited and described accurately in AI-generated answers from tools like ChatGPT, Perplexity and Google's AI Overviews.
In practice they're one program with three scoreboards. The work overlaps far more than the acronyms suggest, and the parts that differ are mostly about measurement and emphasis. Here's what each term means, what's the same, what changes, and how to measure it.
SEO vs GEO vs AEO at a glance
| SEO | AEO | GEO | |
|---|---|---|---|
| Stands for | Search engine optimization | Answer engine optimization | Generative engine optimization |
| Goal | Rank and win the click | Be the direct answer to a question | Be cited and described accurately in AI answers |
| Where it shows up | Search results pages | Featured snippets, AI Overviews, voice and chat answers | ChatGPT, Perplexity, Gemini, Claude, AI Overviews, AI Mode |
| What wins | Pages that best match the query | Clear, extractable answers to specific questions | Pages that rank, facts a model can lift, consistent mentions across the web |
| Main measure | Rankings, clicks, signups | Answer and snippet presence | Citations, share of mentions, AI referral visits |
| Can you see demand? | Yes, keyword volume | Partly | No, prompts have no public volume |
What each term means
SEO
Search engine optimization is making your pages easy to find, crawl, understand and rank in search engines like Google and Bing. It covers keyword research, site architecture, technical health, content and links. The goal has always been the click, and through the click, the customer.
AEO
Answer engine optimization started with featured snippets and voice assistants, where one answer is read out or shown above the results. It now covers AI answers too. The emphasis is on finding the questions buyers ask and answering each one clearly, high on the page. My guide to AEO marketing covers the tactics.
GEO
Generative engine optimization comes from a research paper first published in November 2023 that tested how to make content more visible in AI-generated answers. Adding citations, quotations and statistics raised visibility by up to 40% on the researchers' benchmark. My guide to generative engine optimization covers the full playbook.
You'll also see LLM SEO, AI SEO and AI search optimization. They mean roughly the same thing as GEO.
GEO vs SEO: what stays the same
Google's own position, in its guide to optimizing for generative AI features, is that optimizing for AI search is still SEO. It says you don't need llms.txt or other AI-specific files for Google Search, don't need to break content into tiny pieces, and don't need special schema markup to appear in its AI features.
That matches what I see. The pages that get cited are usually pages that already rank, because many AI tools search the web before they answer. If Google can't crawl, index and rank a page, an AI tool searching the same web is unlikely to find it either.
So the fundamentals carry over unchanged:
- Research the questions and searches your buyers actually use.
- Build one page for each, and make it the best answer on the web.
- Keep the site crawlable, fast and readable without JavaScript.
- Earn mentions from sources your buyers trust.
SEO vs GEO: what changes
The differences are real, but they're changes in emphasis, not a new discipline.
The goal shifts from the click to the citation. For informational queries, the answer often appears before any link. In a Pew Research Center study of 900 U.S. adults' browsing in March 2025, people clicked a traditional result on 8% of visits to search pages with an AI summary and 15% without one. Being the cited source matters more when fewer people click.
Queries get longer. People ask AI tools full questions with context, and the tools break them into several searches behind the scenes. You plan by topic and question, not by single keywords.
Off-site mentions weigh more. What a model says about you draws on reviews, forums, videos and press as well as your own site. Consistent facts about your company everywhere matter more than any one backlink.
Crawler access has new rules. OpenAI says sites that block its OAI-SearchBot crawler won't be shown in ChatGPT search answers, apart from navigational links. Check your robots.txt and your CDN settings for every AI search crawler, not just Googlebot.
Measurement gets fuzzier. There's no keyword volume for prompts, and answers vary between runs. GEO tracking is directional, and anyone who promises a guaranteed spot in ChatGPT is overselling.
Where AEO fits between SEO and GEO
In the SEO vs GEO vs AEO picture, AEO is the overlap. It applies SEO's discipline of matching real searches to questions. Answers are short and clear enough for any engine to lift, which makes AEO useful for both: the same answer-first page can win a featured snippet in Google and a citation in an AI assistant.
The practical AEO habits are worth adopting everywhere:
- Answer the question in the first two or three sentences of the page.
- Use headings that match how people phrase their questions.
- Add an FAQ section for the follow-up questions, written for readers and AI answers. Google stopped showing FAQ rich results in May 2026, so don't add them for the snippet.
- State facts plainly, with numbers and sources.
Moving from SEO to GEO in practice
If you already do SEO well, moving from SEO to GEO is a short list of additions, not a rebuild:
- Rewrite the openings of your key pages so the first two sentences answer the query.
- Add statistics, quotes and sources where they support a claim.
- Describe your company the same way everywhere: your site, profiles, directories and press.
- Allow AI search crawlers, and make sure content renders without JavaScript.
- Track AI referral visits in your analytics, and a set of buyer prompts in a monitoring tool.
- Refresh key pages on a schedule, because AI tools that search the web pick up recent content.
My guide on how to rank in ChatGPT search covers the ChatGPT-specific steps.
How to measure SEO, AEO and GEO
The clearest GEO vs SEO difference shows up in measurement.
| Measure | SEO | AEO | GEO |
|---|---|---|---|
| Visibility | Impressions and rankings in Search Console | Featured snippet and AI Overview presence in rank trackers | Citations and share of mentions from prompt monitoring |
| Traffic | Organic clicks and sessions | Clicks from answer features | Referral sessions from AI assistants in analytics |
| Outcome | Signups and pipeline from organic | Signups from answer-led pages | Signups from AI referrals and self-reported "ChatGPT" answers |
Google counts AI Overviews and AI Mode traffic in Search Console's web results, so it won't show separately there. A "How did you hear about us?" field catches the rest, because people who learned about you in a chat often arrive later by typing your name.
Do you need separate SEO and GEO strategies?
No. Treating SEO vs GEO vs AEO as three programs, with separate teams and budgets, usually means the same pages get optimized three times, with three reports that disagree. Run one search program, measure all three scoreboards, and let the results decide where the next hour goes.
The exception is off-site work. If AI tools describe you wrongly or recommend competitors because of what's said on review sites and forums, that's a PR and community problem, not an on-site one. My guide on when to hire an AEO consultant covers when outside help makes sense.
SEO vs GEO vs AEO: one program, three scoreboards
SEO vs GEO vs AEO is a useful way to think about where buyers find you, not a reason to split your marketing three ways.
Rank first, because ranking pages get cited. Answer questions clearly, so any engine can lift the answer. Then measure clicks, answers and citations side by side. That's how I run SEO and GEO services for startups.
SEO vs GEO vs AEO FAQs
What is the difference between SEO and GEO?
The difference between SEO and GEO is the goal and the scoreboard, which is what most GEO vs SEO debates miss. SEO aims to rank pages in search results and win the click. GEO aims to get your brand cited and described accurately in AI-generated answers. Most of the work is shared, because AI tools often search the web and cite pages that already rank.
What is the difference between AEO and GEO?
The difference between AEO and GEO is scope. AEO focuses on being chosen as the direct answer to a specific question, in featured snippets, voice assistants or AI answers. GEO covers how AI assistants describe and cite your brand overall, including off-site mentions. In practice the terms overlap, and many people use them interchangeably.
Should a startup focus on SEO or GEO first?
A startup should focus on SEO first, with GEO habits built in from the start. Ranking pages are the ones AI tools usually cite, so SEO does most of the GEO work. Write answer-first pages, keep your company facts consistent, allow AI crawlers, and track AI referrals alongside organic search from day one.
Do SEO tools measure GEO?
Traditional SEO tools measure GEO only partly. Search Console includes AI Overviews and AI Mode in its web results without separating them. Rank trackers can show AI Overview presence by keyword. For assistants like ChatGPT, you need prompt monitoring tools, which use synthetic prompts, so treat their numbers as directional rather than exact.
Which matters more for B2B buyers, SEO or GEO?
For B2B buyers, both matter at different stages. Buyers often use AI assistants to understand a problem and shortlist options, then search to compare vendors, read reviews and check pricing. GEO influences the shortlist, and SEO still captures much of the high-intent comparison and pricing traffic that turns into demos and signups.