I’ve exited a £10M agency, and I’m telling you now: most of what you call ‘marketing’ has a shelf life of about 18 months. Maybe less.
For the past decade, the game was simple. You found a keyword, you optimised a page, you built some links, and you watched your little green arrow go up in a rank tracker. We all made a lot of money doing it. That game is over.
The search engine results page—the SERP, the digital real estate we’ve fought over for twenty years—is being replaced. It’s being replaced by a paragraph of text, generated on the fly by an AI that doesn’t 'rank' pages, it gives answers. If your brand isn’t cited as the source of truth within that answer, you don't exist.
Welcome to Generative Engine Optimisation (GEO). It’s not the next version of SEO; it's its replacement. And it requires a complete teardown of how you think about digital marketing.
Let’s be brutally clear. A Large Language Model (LLM) like ChatGPT or Gemini isn't a clever search engine. It's a vast neural network that has ingested a significant chunk of the public internet and formed a probabilistic map of how concepts relate to one another. It doesn't 'crawl your link' to answer a query. It synthesises an answer based on what it already 'knows'.
Its goal isn’t to present you with ten blue links. Its goal is to provide the single most certain, factually-supported answer it can construct. The entire logic has inverted. We’re no longer optimising for a list; we’re optimising for inclusion in a singular, definitive statement.
Take a classic UK-centric query: “What’s the best food delivery app in London?”
An old-school SEO would target that keyword. They’d build a page, get some bloggers in Balham to link to it, and try to outrank Deliveroo and Just Eat on the SERP. The new reality is that the user just asks their AI. The AI's response won't be a link to a blog post. It will be a summary:
“In London, the main food delivery apps are Deliveroo, Uber Eats, and Just Eat. Deliveroo is often praised for its wide restaurant selection and premium options, particularly in central London. Just Eat is known for its extensive coverage across all boroughs and often features more local takeaways. Uber Eats integrates with the Uber app and has a strong user interface…”
Your entire multi-million-pound SEO budget is now competing to be a single, positive sentence inside that paragraph. This isn't theoretical. This is happening right now, and it's cannibalising the organic traffic you thought you owned.
This is where my core contrarian take comes in. Most of the 'AI SEO' advice you're seeing is snake oil. It's just old SEO tactics with a new coat of paint. They're telling you to 'write for AI' or 'use AI keywords'. It's nonsense. You cannot 'trick' a foundational model with a few cleverly placed phrases. You have to fundamentally change the data ecosystem that the AI uses to form its worldview.
You have to stop optimising for keywords and start optimising for certainty.