SEO vs GEO: what changes when search becomes an answer

There is a question we hear more and more from TMI clients: "is SEO still worth investing in, now that everyone asks ChatGPT?" It is a fair question. The short answer is yes, but not quite the way it worked five years ago. Let's take it step by step.

This article explains the difference between SEO and GEO (Generative Engine Optimization), why the shift is happening now, and what a small or medium business should do without panicking or overspending.

The shift that is already happening

For two decades, the behaviour was always the same: someone had a problem, typed a few words into Google, saw a list of results, clicked one or two, and decided. Every bit of SEO work was built around that click.

That is changing. More and more people ask the same question directly to a generative AI tool: ChatGPT, Gemini, Perplexity, or the AI summary that already sits at the top of Google results. The tool reads several sources, pulls the information together, and hands back a ready made answer. Sometimes with no link to click at all.

This does not mean Google has disappeared, or that traditional search died overnight. It means a second path has appeared, used by more people every month, where your business can simply go unmentioned, even if it ranked well on traditional search.

What SEO is, as a reminder

SEO, search engine optimisation, is the work of making your site rank well on Google when someone searches for something related to what you do. It rests on three familiar pillars: relevant content, correct technical structure, and authority, meaning other credible sites linking back to yours.

SEO is still essential. Most people still use search engines every day, and will keep using them for years. It is not a practice to abandon.

What GEO (Generative Engine Optimization) is

GEO is the equivalent work, but for AI generated answers. Instead of trying to rank first in a list of ten links, the goal becomes being one of the sources the AI chooses to build the answer it gives someone.

The core difference is this. With SEO, what counts is ranking. With GEO, what counts is being mentioned. You might not appear anywhere visible, and still be the reason the AI said a certain thing about your industry, or even about your own business.

It is not a new search engine, it is a different way of answering

It is worth being clear about this: ChatGPT or Gemini are not a "different Google" producing the same kind of results. They are systems that read, summarise and synthesise information from several sources at once, then write a coherent answer. The way they select sources is not identical to traditional ranking, although it shares some factors, as we will see next.

What SEO and GEO have in common

The good news is that these are not two completely separate disciplines with opposite rules. Both share a solid base: content that is clear, factual and well structured. If you already do good SEO work, you have already covered half the ground needed for GEO.

• Well written content, without padding, that answers the user's question directly.
• Clear structure, with headings that organise the information logically.
• Authority: other credible sources mentioning or linking to your content.
• Up to date, accurate information, without outdated or contradictory data.

Anyone who invested in quality content over the last few years is not starting from zero. They are adapting what they already have.

What actually changes: from ranking to being mentioned

Here is the practical part. If the goal shifts from "rank first on Google" to "get cited when the AI answers", a few things change:

• Direct answers, right at the start. AI tools favour content that answers the question in the first few lines, without forcing a long build up before getting to the point. Wordy introductions work against you.
• Structured data (schema markup). Technical markup that helps machines understand what is a question, what is an answer, what is a product, what is a review. It makes your content easier to read automatically.
• Question and answer format. Well written FAQ sections have become more valuable than they used to be.
• Consistency across sources. If your site says one thing and your Google Business profile says another, that confuses people and AI alike. Information needs to match everywhere.
• Authority outside your own site. Being mentioned in the press, in industry directories, in relevant forums and communities matters more than ever. AI tools cross reference multiple sources, not just your site.

How AI tools choose what to cite

There is no public, definitive formula yet, the way Google's ranking algorithm evolved publicly over the years. What available research and direct observation suggest is that these tools favour well structured content, sources with a consistent reputation, and information that is easy to verify and cite without ambiguity. The more confusing, promotional or vague your text is, the fewer chances you have of being the chosen source.

How to tell if you already show up in AI answers

Before changing anything, run a simple test. Open ChatGPT, Gemini or Perplexity, and ask what a customer of yours would ask: "who is the best digital marketing agency in Porto", or the equivalent for your business and location. Repeat the question a few different ways, three or four times.

Notice two things: whether your business gets mentioned, and whether the information is correct. AI tools often mention businesses with outdated details, because they found old information somewhere online. That is the first problem to fix, before thinking about optimising anything else.

What a small or medium business should do now

There is no need to rebuild your site or panic. It does make sense, though, to adjust priorities:

• Review your most important pages and make sure they answer the visitor's main question in the first few sentences, without detours.
• Create or update an FAQ section, with short, direct, honest answers to the questions your customers ask most.
• Make sure your Google Business profile, social media and website say exactly the same thing about your business: name, address, services, phone number.
• Keep, or start, investing in useful, regular content, articles like this one, that answer real questions from your industry.
• If you have a technical team or a partner handling your site, ask whether structured data (schema) is already in place. If not, it is a small investment with a lasting return.

None of this replaces the groundwork: a fast, well written site, with honest content about what you do. GEO is not a shortcut. It is a natural extension of doing SEO properly in the first place.

What not to do

A few mistakes we are already seeing in the market:

• Filling the site with artificial FAQ entries, just to "show up" in AI tools, without answering anything real customers actually ask.
• Dropping traditional SEO halfway through, assuming it became obsolete. It did not.
• Copying generic answers from other sites, hoping the AI will pick them. AI tools tend to prefer original, specific sources, not copies.
• Treating this as a short term race. Like SEO, GEO results build up over months, through consistent work.

Neither replaces the other, for now

SEO and GEO are not enemies, and there is no need to choose one over the other. They will coexist for the coming years, each one driving traffic and visibility through different paths. Whoever treats their content foundation seriously, with clear, honest and well structured information, is prepared for both.

If you still do not know where to start, the first step is always the same: look at what you already have and ask whether it clearly answers the real questions of whoever is looking for what you do. Everything else builds from there.