GEO vs SEO: What Businesses Need to Know About Generative Engine Optimization

If you run a business that depends on Google traffic, you have probably heard the term GEO services tossed around. Maybe a salesperson pitched you a “generative engine optimization” package. Maybe your team flagged a click dip after Google rolled out more AI Overviews. Either way, the question is the same: do you actually need GEO, or is it just SEO in a fresh coat of paint?

I run LoudScale, a growth agency, and we get this question weekly. The honest answer: GEO is real, it matters, and most of it is still being figured out in real time. Here is the unvarnished version.

In May 2025, Ahrefs analyzed 25 million AI Overviews and found that about 16% of all US searches now trigger an AI Overview, up from 7.6% two months earlier (Ahrefs, May 2025). That same study confirmed what we all felt in our analytics: when an AI Overview shows up, the #1 organic result sees roughly a 34.5% drop in click-through rate (Ahrefs, April 2025). The goalposts moved. SEO is not dead. Read on for what is changing, what is hype, and what to actually do.

Quick Answer

GEO is the practice of getting your brand mentioned and cited inside AI answers from ChatGPT, Perplexity, Google AI Overviews, Google AI Mode, Gemini, Claude, and Bing Copilot. SEO is not being replaced; it is being absorbed into a broader discipline where ranking well is the price of admission and being cited by the AI is the prize.

What is generative engine optimization (GEO)?

GEO stands for generative engine optimization, the practice of making your brand, content, and expertise easy for AI assistants to find, understand, and cite. The term was coined in a 2023 paper by Aggarwal, Murahari, Rajpurohit, Kalyan, Narasimhan, and Deshpande, titled GEO: Generative Engine Optimization, which defined the field and proposed methods that could improve source visibility in generative responses by up to 40% (arXiv:2311.09735). The paper was accepted to KDD 2024.

Two terms you need before the rest makes sense:

• LLM (large language model): the AI brain inside ChatGPT, Claude, and Gemini. It generates text one token at a time based on patterns learned during training.
• Retrieval-augmented generation (RAG): how modern AI assistants look stuff up live. When you ask ChatGPT or Perplexity a question, the model does not just guess from memory; it actively searches the web, pulls current sources, and synthesizes an answer. This is why traditional SEO still matters: AI still needs a ranked web to read from.

How GEO differs from SEO

GEO and SEO overlap heavily, but the goal is different. SEO optimizes pages to rank in a list of blue links. GEO optimizes your brand to be cited inside a single AI-written answer that may never send you a click. Google’s Gary Illyes has said AI Overviews and AI Mode use the same crawler, index, and ranking systems as classic search, and that a separate “AI SEO” playbook is not necessary (Search Engine Journal, July 2025). That is reassuring. SEO is the foundation; GEO is what you build on top.

Comparison table: SEO vs GEO side by side

Dimension	SEO	GEO
Primary goal	Rank in a list of links	Be cited inside an AI answer
Core metric	Organic clicks, rankings, traffic	AI mentions, citations, share of voice
Content format	Long-form, keyword-targeted	Structured, factual, easy to parse
Authority signal	Backlinks, domain age, E-E-A-T	Branded mentions across the web, entity consistency, freshness
Success looks like	Page one, top three positions	Your brand named as a source, with or without a link
Primary on-page tactics	Keywords, titles, internal links	Clear definitions, schema, FAQ structure, statistics
Off-page work	Link building, digital PR	Reviews, Reddit threads, Wikipedia, YouTube, PR mentions
User behavior	Click and explore	Ask and receive, often zero-click
Funnel role	Mid-funnel discovery	Top-of-funnel awareness inside the AI

If you notice the table looks like SEO with extra rows, that is the point. GEO is an extension, not a replacement.

Where AI answers come from

AI assistants pull answers from three places: what was baked into the model during training, what they fetch live via RAG, and what they cite as links or inline references. That last bucket is where your brand has a chance to show up.

A few patterns are worth knowing:

• Wikipedia, YouTube, Reddit, and Quora dominate citations. Ahrefs found YouTube and Reddit rank among the top three domains cited by AI Overviews, ChatGPT, and Perplexity (Ahrefs, August 2025).
• Top-10 ranking pages get cited most. A study of 1.9 million AI Overview citations found 76% of cited pages already ranked in the top 10 organic results (Ahrefs). Strongest evidence yet that classic SEO is the entry ticket to GEO.
• Freshness matters more than in classic SEO. AI assistants lean toward recently updated content compared to traditional blue-link rankings, so refreshing cornerstone pages quarterly is now a real lever.
• Unlinked brand mentions count. An Ahrefs correlation study found branded web mentions correlated more strongly with AI Overview appearances than backlink count (Ahrefs). PR, podcast appearances, and review mentions help even without a hyperlink.

Pull quote

“GEO is the next layer of SEO. The brands that win are the ones already winning in classic search, then layering entity clarity, structured data, and presence on the platforms AI trusts.”

Practical checklist: 10 things you can do today to win in AI search

1. Audit your top 10 organic pages. If you are not ranking in classic Google, you are not getting cited by AI. Fix SEO first.
2. Add a clear entity block on every key page. Brand name, one-line description, founders, HQ, identical wording across your site, Wikipedia, and Crunchbase.
3. Implement FAQ and Article schema. AI crawlers parse structured data more reliably than prose. Use on every commercial and informational page.
4. Write the direct answer first. Begin sections with a 1–3 sentence answer. Both AI Overviews and Perplexity reward this structure.
5. Publish original statistics with a methodology line. AI models love citable data. Publish first and you become the source everyone references.
6. Get mentioned on Reddit, YouTube, and industry roundups. These three platforms drive a disproportionate share of AI citations. Post useful answers, not ads.
7. Refresh cornerstone content every 90 days. Freshness is a stronger ranking signal in AI Overviews than in classic results.
8. Build a Wikipedia strategy if you qualify. AI assistants lean on Wikipedia for entity facts. If you qualify, get a page; if not, focus on mentions in articles that cite competitors.
9. Track AI citations with Ahrefs Brand Radar, Profound, or Otterly. Search Console does not yet surface AI Overview clicks separately.
10. Stop blocking GPTBot, ClaudeBot, and PerplexityBot. Many sites accidentally block AI crawlers in robots.txt. Verify yours does not.

Common mistakes businesses make with GEO

A few I see over and over:

• Treating GEO as separate from SEO. They share the same foundation. Siloing GEO into a different team duplicates work and confuses Google.
• Chasing AI citations without earning rankings. You cannot skip the queue. The page that ranks #8 in classic Google rarely gets cited by ChatGPT.
• Stuffing stat blocks into content hoping AI picks them up. Models are trained to detect shallow optimization. Write for humans first, structure for machines second.
• Ignoring Bing. Bing Copilot and Claude-powered search on Bing are quietly picking up share. Add Bing Webmaster Tools to your monthly review.
• Buying “GEO services” packages that promise #1 placement. No one can guarantee AI citations today. Run from anyone who claims otherwise.

FAQ

What is GEO in marketing?

GEO stands for generative engine optimization. In marketing, it means structuring content, brand presence, and entity data so AI assistants like ChatGPT, Perplexity, Gemini, and Google AI Mode mention or cite your brand. The original definition comes from a 2023 paper by Aggarwal et al. (arXiv:2311.09735).

Is GEO replacing SEO?

No. SEO is the foundation. Ahrefs found 76% of AI Overview citations come from pages already ranking in the top 10 organic results (Ahrefs). Google’s Gary Illyes said AI Overviews and AI Mode use the same crawler, index, and ranking systems as classic search (Search Engine Journal, July 2025). The two are merging.

Do I still need SEO if I do GEO?

Yes. GEO depends on it. AI assistants use retrieval-augmented generation to pull live sources from the web and overwhelmingly cite pages that rank well in Google or Bing. Broken SEO means broken GEO.

What is AEO and how is it different?

AEO, or answer engine optimization, is the older cousin of GEO. AEO focuses on getting picked up by voice assistants, featured snippets, and direct-answer boxes. GEO is broader and covers generative AI responses, where the answer may be a paragraph of synthesized text rather than a single featured snippet. In practice the terms get used interchangeably; Ahrefs notes GEO, AEO, and LLMO describe the same general discipline (Ahrefs).

How do I get cited by ChatGPT and Perplexity?

Three things move the needle: rank on page one of Google for the topic, get mentioned by third-party sources AI trusts (Reddit, YouTube, Wikipedia, niche review sites), and structure content so AI can lift a clean fact, statistic, or definition. Original data and clear definitions get cited far more than opinion essays.

How do I measure GEO success?

Track four metrics: AI share of voice (mentions in AI responses vs. competitors), AI citations (pages linked as sources), AI-driven referral traffic (small but high-quality), and branded search lift (indirect signal AI mentions drive awareness). Tools like Ahrefs Brand Radar, Profound, and Otterly surface this directly.

Should small businesses invest in GEO in 2026?

Yes, but lightly. Most small businesses should not pay for a standalone GEO retainer yet. Fold GEO into existing SEO work: add FAQ schema, write direct answers, refresh cornerstone content quarterly, and spend a few hours a month building presence on Reddit and YouTube. That covers 80% of the upside without extra headcount.

Final Takeaway

GEO is not a separate industry. It is SEO evolving to fit a world where the first answer a customer sees is an AI-written paragraph, not a list of ten blue links. The brands winning right now do three things: rank well in classic search, get mentioned across the platforms AI trusts, and write content structured enough for a machine to lift a clean fact or statistic. Do those well and the GEO labels stop mattering.

If you want help figuring out where you stand, we offer GEO services built on top of solid SEO fundamentals. No magic, no promises of #1 placement. Just an audit of your entity, schema, AI citation footprint, and content structure, plus a 90-day plan you can execute. Reach out when you are ready.

Sources

• Aggarwal et al., GEO: Generative Engine Optimization, arXiv:2311.09735 (KDD 2024) — Original GEO definition and benchmark.
• Ahrefs, “AI Overviews Have Doubled” — May 2025 — 16% of US searches now trigger an AI Overview.
• Ahrefs, “AI Overviews Reduce Clicks by 34.5%” — April 2025 — 34.5% CTR drop for top result.
• Ahrefs, “GEO: Growth Strategies and Metrics For the AI Era” — Aug 2025 — Practical GEO playbook.
• Ahrefs, “76% of AI Overview Citations Pull From the Top 10” — 1.9M citations studied.
• Search Engine Journal, “Google Says You Don’t Need AEO Or GEO” — July 2025 — Gary Illyes statement.
• Ahrefs, “Factors That Correlate With Brand Appearance in AI Overviews” — Branded mentions correlation.
• Ahrefs, “Do AI Assistants Prefer to Cite Fresh Content?” — Freshness signal.