Traditional SEO is more effective for measurable traffic and sales: Google handles 87.6% of Australian and 92.6% of Singaporean searches, and AI assistants send well under 1% of website visits. GEO matters for a different outcome, being cited inside AI answers. The two share one foundation, so the sensible choice is SEO first, then GEO where buyers research with AI.
That is the short answer. The longer one is more interesting, because most of what gets published on this question comes from companies that sell GEO, SEO or the software behind both. We are one of them. We run SEO and GEO programs for clients, so read this knowing we have a stake in the answer.
So this comparison leans on evidence nobody is selling: a peer-reviewed study of 973 e-commerce websites, a randomised experiment on Google's AI Overviews, a NeurIPS benchmark of popular GEO tactics, and Google's own May 2026 documentation. Where the evidence runs out, we say so.
GEO vs SEO: 10 differences that decide which one works
Effectiveness depends on what you are trying to get, so we start with the goal and end with the part most articles skip: what nobody can promise you.
1. They are trying to win different things
SEO tries to win a ranking and, through it, a click. Success is a visit to your site, and everything downstream of that visit (the lead, the sale, the sign-up) can be measured.
GEO, short for generative engine optimisation (often spelled optimization), tries to win a place inside an answer. The goal is for ChatGPT, Gemini, Perplexity, Copilot, Claude or Google's AI features to cite your page, mention your brand, or recommend you when someone asks a question in your category. Sometimes that produces a click. Often it does not.
How often not? In Pew Research Center's analysis of 68,879 Google searches by 900 US adults, people clicked a link inside an AI summary in just 1% of visits to a page that showed one. One discipline produces visits. The other mostly produces influence.
One Question, Two Paths
The same buyer question can end in a click on your site or in an answer that mentions you and never sends anyone. SEO and GEO are optimising for different ends of that fork.
The SEO path
A search engine ranks pages. The searcher scans the list and clicks. Value arrives as a session you can measure.
Query → ranked results → click → your site → lead or sale
The GEO path
An AI system retrieves pages, writes an answer and cites a few sources. Value arrives as a mention, a recommendation, sometimes a click.
Prompt → retrieval → written answer → citation or mention → maybe a click
What SEO success looks like
Rankings, impressions, clicks, sessions and conversions, most of it visible in Search Console and your analytics.
What GEO success looks like
Citation and mention rates across a fixed set of prompts, AI impressions, and a smaller stream of AI referral visits.
The part both paths share
A page that is crawlable, indexed and genuinely useful. Google says a page must be indexed and eligible for a snippet before it can appear in AI Overviews or AI Mode at all. Without that foundation, neither path starts.
Sources: Google Search Central, AI optimisation guide, 15 May 2026 • Pew Research Center, 22 July 2025
Created by Arfadia • arfadia.com/blog
2. They show up in different places
SEO lives in the ranked results of Google and Bing. GEO lives in answer surfaces: AI Overviews, AI Mode, ChatGPT, Perplexity, Gemini, Copilot and Claude.
Here is the catch. AI Overviews and AI Mode sit inside Google and draw on the same index as the blue links, so "GEO for Google" and "SEO for Google" overlap heavily. GEO for ChatGPT or Perplexity overlaps less, because those systems run their own crawlers and selection logic.
3. Content gets selected differently, but less differently than you might expect
A traditional search engine ranks whole pages for a query. A generative engine retrieves pages, pulls relevant passages, writes an answer, and attaches citations to parts of it. Google describes its AI features as using retrieval-augmented generation over its Search index, and AI Mode uses a technique called query fan-out, splitting one question into several related searches that run at once.
Google does not see this as a different discipline. Its guide to optimising for generative AI features, published 15 May 2026, says that from Google Search's perspective, optimising for generative AI search is optimising for the search experience, and thus still SEO. Plenty of practitioners disagree with that framing, but it is the only first-party statement on how the largest AI answer surface picks its sources.
4. Most of the foundation is shared
The same Google guide is blunt about what you do not need. No special technical requirements beyond normal Search eligibility. No need to break content into small chunks for AI systems. No need to rewrite pages in a special "AI style", because the systems understand synonyms and meaning. It also warns against chasing inauthentic mentions.
Outside Google, the shared foundation is crawler access. OpenAI separates its search crawler (OAI-SearchBot) from its training crawler (GPTBot), and Anthropic does the same with Claude-SearchBot and ClaudeBot. Blocking a training crawler does not remove you from that company's search answers; blocking the search crawler does. Google-Extended controls Gemini training and does not affect Google Search. Check your robots.txt before anyone sells you a GEO audit.
5. On traffic, SEO still wins by a very wide margin
The best evidence on this is a peer-reviewed study in Marketing Science by Maximilian Kaiser and Christian Schulze. They analysed 12 months of first-party data from 973 e-commerce websites with about USD 20 billion in combined revenue, covering more than 50,000 transactions referred by ChatGPT and 164 million from traditional channels, between August 2024 and July 2025.
One year after ChatGPT began showing shopping links, traffic from large language models was under 0.2% of all traffic in the sample.
Two caveats. It is e-commerce data, so it does not describe B2B lead generation. And the first author works for Grips Intelligence, which supplied the data, as the paper discloses. Neither changes the direction: AI referrals are growing, from a very small base.
6. AI Overviews are taking clicks, but the headline numbers measure different things
Most comparison articles quote one dramatic percentage as if it were the effect of AI Overviews. There are at least four serious studies, and each measures something different:
| Study | What it measured | Finding | Type of evidence |
|---|---|---|---|
| Agarwal and Sen, 2026 | Outbound organic clicks when an AI Overview appears, 1,065 US desktop Chrome users randomly assigned to see or not see AI Overviews | Organic clicks down 39.8%, zero-click searches up 34.5%, no measurable gain in perceived search quality | Randomised field experiment, working paper, not yet peer reviewed |
| Pew Research Center, 2025 | Share of results-page visits followed by a click on a traditional result, 900 US adults, March 2025 | 8% with an AI summary, 15% without | Independent behavioural panel |
| Ahrefs, 2025 and 2026 | Position-one click-through rate on 300,000 keywords, compared with a forecast without AI Overviews | 34.5% lower in April 2025, 58% lower on December 2025 data | Vendor study, correlational |
| Seer Interactive, 2026 update | Organic click-through rate on its own clients' queries, split by whether the brand was cited in the AI Overview | CTR stabilised in early 2026; being cited delivered 2 to 5 times the organic CTR of not being cited through 2025 | Agency data, client sample |
The direction is clear: when an AI Overview appears, fewer people click organic results. The randomised experiment is the strongest because it isolates cause, so its 39.8% is the number we would show a board, with the "working paper" label attached.
Seer's split matters most for GEO. If AI Overviews appear anyway, being cited inside them beats ranking beneath them uncited. That is the most solid argument for GEO on Google, and it is still an argument about clicks from Google.
7. Visitor quality: vendor claims and peer-reviewed data disagree
You have probably seen the claim that AI visitors are worth several times more than organic visitors. Semrush reported that the average AI search visitor is worth 4.4 times the average organic visitor, based on conversion rate, alongside projections of where AI channels are heading.
The Marketing Science study, using observed transactions rather than a model, found the opposite overall. ChatGPT referrals converted better than paid social but worse than every other traditional channel, organic search included, on both conversion rate and revenue per session. The two use different samples, methods and attribution, and Semrush's study is built around its own projections of AI search growth.
The useful nuance is in the same paper. Product complexity changed the picture: AI referral performance and traffic share were stronger in complex categories, where buyers need things compared and explained. If you sell something that takes a spreadsheet to choose, GEO deserves a closer look. If you sell socks, less so.
8. The tactics sold as GEO work less reliably than advertised
The term GEO comes from a 2024 paper by Aggarwal and colleagues, presented at KDD. On their benchmark, adding citations, quotations and statistics lifted a source's visibility in generative answers by up to roughly 40%, and keyword stuffing did nothing useful.
The follow-up that rarely gets mentioned is C-SEO Bench, presented at NeurIPS 2025. It tested conversational SEO methods across multiple domains and, crucially, in scenarios where several competitors adopt the same tactics at once. Most methods turned out to be largely ineffective and frequently lowered a document's position. Traditional SEO methods, the ones aimed at improving retrieval ranking, had a significantly larger effect on citation rankings.
Next to Google's guidance, a pattern emerges. The effective part of GEO looks a lot like good SEO: be retrievable, be relevant, be worth citing. The tricks on top matter less, and less still once everyone uses them.
9. Measurement is newer and noisier for GEO
SEO measurement is mature: Search Console shows queries, clicks and positions, and analytics ties sessions to outcomes.
GEO measurement is catching up. On 3 June 2026 Google introduced generative AI performance reports in Search Console, showing how often your URLs appear in AI Overviews, AI Mode and Discover, by page, country, device and date. It started with a subset of sites and was widely available by August. It does not yet show clicks or the queries behind those impressions.
For ChatGPT, Perplexity and the rest, you rely on third-party trackers that run a set of prompts and record the answers. Read them as directional: results depend on the prompts chosen, and answers move. Ahrefs, which sells such a tracker, reports that AI Overviews change between observations about 70% of the time. A single screenshot proves very little.
10. Nobody can guarantee a citation
There is no submission form for ChatGPT's answers and no paid slot inside an AI Overview's written text. Outputs vary by prompt, engine, location and time.
So if a provider guarantees you citations, a ranking inside ChatGPT, or a fixed number of AI mentions, treat that as a red flag rather than a feature. Google's own guidance on third-party SEO advice now applies explicitly to AEO and GEO services too.
What AI engines cite when you ask this exact question
We track how AI engines answer a set of prompts using Promptwatch, an AI visibility platform we hold a paid licence for. One prompt is, word for word, "Can you compare the effectiveness of generative engine optimization versus traditional SEO techniques?"
Between 10 and 18 September 2026, across roughly a hundred responses from Perplexity, Google AI Overviews, ChatGPT, Google AI Mode, Gemini and Copilot, the answers to that prompt carried 366 citations to 83 domains. We sorted every domain by what the site primarily does.
Who AI Cites When Asked "GEO or SEO?"
366 citations across 83 domains in AI answers to one tracked prompt. Share of citations by the type of site cited.
36.1%
Software vendors
Content management systems, SEO suites and AI visibility tools. 23 domains, 132 citations.
31.7%
Agencies and other commercial sites
Marketing agencies, consultancies and commercial blogs. 41 domains, 116 citations.
10.7%
Google's own documentation
Search Central guides and blog posts. 39 citations.
8.2%
Academic repositories
arXiv, ResearchGate, SSRN and similar, including preprints. 30 citations.
What was missing
The peer-reviewed Marketing Science study, the randomised AI Overviews experiment and the NeurIPS C-SEO Bench paper were not cited once. Pew's click study appeared only through a single news write-up. The remaining citations went to YouTube, LinkedIn, Medium and Quora (10.9%), news and education sites (1.9%), and two copies of Google documentation hosted on other domains (0.5%).
Sources: Promptwatch citation export for one tracked prompt, 10 to 18 September 2026, persona "business owner in Indonesia" • Site classification by Arfadia based on each domain's primary business
Created by Arfadia • arfadia.com/blog
Roughly two thirds of the citations went to companies selling software or services in this space. The most-cited page, with 28 citations, was a blog post from a content management system vendor. That does not make those pages wrong. But when a business owner asks an AI assistant whether GEO is worth paying for, the answer is built mostly from sources with something to sell, while the strongest independent evidence barely registers.
Three limits. It is one prompt over nine days. The tracking persona was a business owner in Indonesia, and answers vary by location. And the classification is ours. Our own site was not cited at all for this prompt, which is part of why we wrote this.
GEO vs SEO at a glance
| Dimension | Traditional SEO | Generative engine optimisation (GEO) |
|---|---|---|
| Primary goal | Rank and earn the click | Be cited, mentioned or recommended inside an answer |
| Where it shows up | Google and Bing ranked results | AI Overviews, AI Mode, ChatGPT, Perplexity, Gemini, Copilot, Claude |
| How content is chosen | Pages ranked for a query | Pages retrieved, passages used, sources cited; Google adds query fan-out |
| Shared foundation | Crawlable, indexed, useful content; correct crawler settings; a credible reputation beyond your own site | |
| Strongest evidence of effectiveness | Organic search out-converts ChatGPT referrals in a 973-site peer-reviewed study | Cited brands earn 2 to 5 times the CTR of uncited ones in AI Overviews (agency data) |
| Traffic delivered today | The large majority of search traffic | Under 0.2% of traffic in the e-commerce study, growing |
| Main measurement | Search Console, analytics, rank tracking | Search Console AI report (impressions only), prompt trackers, AI referral sessions |
| Can results be guaranteed? | No | No, and outputs are less stable than rankings |
| Best fit | Almost every business with a website | Complex, high-consideration purchases where buyers research with AI |
| Biggest risk | Losing clicks to AI answers on informational queries | Paying for tactics that do not hold up, or for guarantees nobody can keep |
What changes in Australia and Singapore
Most evidence above is US or international. We found no Australian or Singaporean study of AI Overviews' effect on clicks. Local data points two ways at once.
Google still dominates search. In August 2026, StatCounter put Google at 87.58% of search engine market share in Australia, with Bing at 9.41%, and at 92.61% in Singapore, with Bing at 3.61%. Australia's Bing share is high enough that Bing Webmaster Tools deserves a place in your routine.
AI use is also mainstream. Roy Morgan found that 13.6 million Australians, 58% of people aged 14 and over, used AI tools in an average four weeks during the March quarter of 2026, with ChatGPT used by 10.5 million, Gemini by 5 million and Copilot by 4 million. In Singapore, Microsoft's AI Economy Institute estimated that 60.9% of the working-age population used generative AI in the second half of 2025, second highest in the world. That figure is modelled from Microsoft usage data, not surveyed.
Google's AI surfaces are live in both markets. AI Overviews reached Australia and Singapore in Google's expansion to more than 100 countries in late October 2024. AI Mode launched in Australia on 8 October 2025 and in Singapore as part of the English-language rollout to 180 countries in August 2025.
Buyers in both markets use Google for most searches and AI tools for a growing share of research. That argues for doing both, in the right order.
When this comparison does not apply
Not every business should spend on GEO, and not every conclusion above travels.
Local, walk-in and emergency businesses. If customers find you through Maps and call within minutes, your Business Profile and local SEO matter far more. Google's own guidance points local businesses to Business Profiles for AI visibility too. We found no study of GEO returns here, so this is reasoning, not a finding.
Simple, low-consideration products. The Marketing Science study found AI referrals weakest where products are simple. If buyers do not need an explanation, an AI answer adds little.
Sites that are not indexable. GEO cannot rescue a site that search engines cannot crawl. Fix that first.
Businesses that need attributable revenue this quarter. AI influence often happens without a tracked click, and last-click attribution understates it. If budgets are judged on last-click sales, GEO will look worse than it is.
The limits of this article. The effectiveness evidence is mostly US and international. The citation data is one prompt over nine days with an Indonesian tracking persona. We will update this piece when Australian or Singaporean studies appear.
A sensible order of work
If you are deciding where the next dollar goes, this sequence follows the evidence.
Start with the SEO foundation: crawlable, indexed pages that answer real questions better than the alternatives. Check robots.txt so AI search crawlers can reach you. Pick a fixed set of prompts your buyers genuinely ask and record where you appear today. Earn mentions on sites your buyers already trust, honestly. Then measure with Search Console's AI report, analytics and a prompt tracker, and judge the trend over months.
We run both disciplines at Arfadia, from Jakarta, for clients across Asia Pacific. If you want to see how we scope them, our SEO and GEO service pages lay it out, and our checklist for evaluating a GEO agency works just as well for judging us as anyone else.
Frequently Asked Questions
Is GEO more effective than SEO?
Not for traffic or sales today. A peer-reviewed study of 973 e-commerce sites found AI referrals made up under 0.2% of traffic and converted below organic search. GEO is more effective at a different goal, getting your brand cited inside AI answers, which matters most for complex purchases where buyers research with AI.
Is GEO just SEO rebranded?
Partly. Google says optimising for its generative AI features is still SEO, and a NeurIPS 2025 benchmark found traditional ranking work moved AI citations more than most GEO-specific tactics. What is genuinely new is the target (citations and mentions), the number of engines involved, and how results are measured.
Do AI Overviews reduce website traffic?
Yes, on queries where they appear. A randomised experiment with 1,065 US users found AI Overviews cut outbound organic clicks by 39.8%. Pew found people clicked a traditional result in 8% of visits with an AI summary versus 15% without. The studies measure different things, so avoid quoting one number as the effect.
Do visitors from ChatGPT convert better than visitors from Google?
Not overall, based on the strongest evidence available. Some vendors cite multiples such as 4.4 times, but a peer-reviewed study of observed transactions found ChatGPT referrals converted better than paid social and worse than organic search. Results were stronger for complex products.
Can an agency guarantee citations in ChatGPT or Google AI Overviews?
No. No AI platform offers a submission path or a guaranteed placement inside its written answers, and outputs change by prompt, engine, location and time. Treat any guarantee of citations or AI rankings as a warning sign.
Does blocking GPTBot remove my site from ChatGPT search?
No. GPTBot is OpenAI's training crawler. ChatGPT search uses OAI-SearchBot, which you control separately in robots.txt. Blocking OAI-SearchBot is what removes you from ChatGPT search answers.
Should a small business in Australia or Singapore invest in GEO?
Usually after SEO basics are in place, and mainly if customers research complex purchases with AI tools. A local, walk-in business will usually get more from its Google Business Profile and local SEO than from a GEO program.
Sources & References:
- Kaiser, M. and Schulze, C. (2026). ChatGPT Referrals to E-Commerce Websites: How Do LLMs Compare Against Traditional Channels? Marketing Science 45(4), 699 to 715. 973 websites, August 2024 to July 2025. doi.org/10.1287/mksc.2025.0489
- Agarwal, S. and Sen, A. The Impact of Google AI Overviews on Publisher Traffic and User Experience: Evidence from a Field Experiment. SSRN working paper, posted 3 April 2026, revised 17 June 2026. ssrn.com/abstract=6513059
- Pew Research Center, Google users are less likely to click on links when an AI summary appears in the results, 22 July 2025. pewresearch.org
- Ahrefs, AI Overviews reduce clicks, April 2025, and update on December 2025 data. ahrefs.com/blog/ai-overviews-reduce-clicks-update. AI Overview volatility figures from ahrefs.com/ai-overviews-tracker
- Seer Interactive, AIO Impact on Google CTR: 2026 Update. seerinteractive.com
- Semrush, AI search and SEO traffic study (source of the 4.4 times visitor value figure). semrush.com
- Aggarwal, P. et al. GEO: Generative Engine Optimization. KDD 2024. arxiv.org/abs/2311.09735
- Puerto, H. et al. C-SEO Bench: Does Conversational SEO Work? NeurIPS 2025, Datasets and Benchmarks Track. proceedings.neurips.cc
- Google Search Central, Optimizing your website for generative AI features on Google Search, 15 May 2026. developers.google.com
- Google Search Central Blog, Introducing Search Generative AI performance reports in Search Console, 3 June 2026. developers.google.com
- Crawler documentation: Google common crawlers developers.google.com; OpenAI crawlers platform.openai.com/docs/bots; Perplexity crawlers docs.perplexity.ai; Anthropic crawlers support.claude.com
- StatCounter Global Stats, search engine market share, August 2026: Australia and Singapore
- Roy Morgan, 13.6 million Australians now use AI tools, Finding No. 10248, 2 June 2026, n=14,646. roymorgan.com
- Microsoft AI Economy Institute, Global AI Adoption in 2025, 8 January 2026. blogs.microsoft.com
- AI Overviews expansion to more than 100 countries, 28 October 2024; AI Mode launch in Australia, 8 October 2025, as reported by Australian media including Mediaweek; AI Mode English rollout to 180 countries, August 2025, as reported by TechCrunch
- Search Console AI report availability across properties by August 2026: Search Engine Roundtable check of 25 properties, 11 August 2026, summarised by Relevant Audience
- Citation data: Promptwatch export for the prompt "Can you compare the effectiveness of generative engine optimization versus traditional SEO techniques?", 10 to 18 September 2026, 366 citations, 83 domains, persona business owner in Indonesia. Arfadia holds a paid agency licence for Promptwatch. Domain classification by Arfadia.