SEO vs GEO: what changes when your buyers ask AI

SEO and GEO chase the same buyer at different moments. SEO wins a click from a list of links. GEO (generative engine optimisation) wins a mention inside the answer an AI assistant writes, often before anyone clicks at all. Most of what makes good SEO still matters; what changes is where you are scored and how.

SEO and GEO side by side

	SEO	GEO
Goal	Rank a page in the results	Be named, recommended and cited in the answer
Where it shows	Google and Bing results pages	ChatGPT, Gemini, Claude, Perplexity and Google's AI Overviews
What a win looks like	A top-three position and a click	Named first, described accurately, your page cited as a source
How many places to win	About ten links per page	A handful of brands per answer
How you measure it	Rankings, impressions and clicks (Search Console)	Presence, first position, share of voice and cited sources, per engine
What moves it	Relevance, links, technical health, content quality	All of those, plus quotable facts, statistics, citations and consistent facts about who you are
How fast it changes	Weeks after a page is indexed	Weeks for answers built from search; a new model version for answers from training
Who writes what the buyer reads	You write the title and the snippet	The engine writes the answer; you supply the material

What stays the same

Crawlable pages, genuinely useful content and authority still decide who gets found. On 11 October 2026, our study of 96 everyday South African searches across 12 sectors found an AI Overview on 92 of them: see the state of AI Overviews in South Africa. In a separate, smaller check the same day, we ran 12 marketing searches on Google South Africa: 10 showed an AI Overview, and in 9 of those 10, the Overview cited at least one site that also ranked in the top five ordinary results. Pages that rank are often among the pages AI search cites.

What changes

• The click may never happen. The buyer reads a summary. If your brand is not in it, a high ranking further down the page may never be seen.
• The description matters, not just the position. An answer can name you and still describe you wrongly or lukewarmly. GEO tracks how you are described, not only whether.
• Each engine answers differently. ChatGPT, Gemini and Claude learned from different data, and only some answers search the web. One ranking report becomes several.
• Answers vary between runs. Ask the same question twice and the brands named can change, so one check proves little. Measure repeatedly, on a fixed set of questions.

Where to start

1. List the 20 to 50 questions your buyers ask before they choose, most of them without your brand name in them.
2. Measure where you stand today on several engines: named, named first, share of voice and cited sources.
3. Fix the basics: pages readable without JavaScript, and a robots.txt that lets the AI search crawlers you want in.
4. Rewrite your most important pages to be quotable: the answer first, then specific, dated facts, tables and a short FAQ.
5. Re-measure monthly on the same questions, and compare against named competitors.

The full background is in our guide to generative engine optimisation for South African brands.