GEO/AI Search Optimization: Rank in ChatGPT, Gemini, and Perplexity

What is GEO (Generative Engine Optimization)?

GEO is the process of optimising content to get cited in AI-generated search results. Instead of ranking in traditional Google results, you optimise to be selected as a source by ChatGPT, Google Gemini, Perplexity, Claude, and other AI engines.

New to the term? Our explainer, What Is GEO?, covers the basics; this guide focuses on how to get cited.

This isn't replacing traditional SEO-it's supplementing it. As more users rely on AI to answer questions, your visibility depends on being selected as a credible source for those AI systems.

How AI Engines Select Sources

Google AI Overviews

Google's AI selects sources based on:

• Topic authority and topical relevance
• E-E-A-T signals (Experience, Expertise, Authoritativeness, Trustworthiness)
• Content freshness (recently updated content ranks higher)
• Clear content structure (H2s, lists, tables are easier for AI to parse)
• Current Google ranking (top 10 rankings increase citation probability)

ChatGPT & Perplexity

These models are trained on web data and select sources based on:

• Content relevance to the user query
• Domain authority (established brands are cited more often)
• Content comprehensiveness (longer, more detailed content gets cited)
• Recency (training data cutoffs mean older content is less visible)

The GEO Ranking Checklist

1. Topic Authority (E-E-A-T)

• Demonstrate 5+ years of industry experience
• Publish author bios with credentials
• Create topic cluster content (pillar + supporting articles)
• Earn backlinks from authoritative sources
• Get mentioned/quoted by industry publications

2. Content Structure

• Use clear H2 headings (2-3 per 500 words)
• Break content into short paragraphs (2-3 sentences)
• Use lists and tables instead of walls of text
• Define key terms explicitly

3. Schema Markup

• BlogPosting schema for articles
• FAQPage schema for FAQs (critical for AI selection)
• BreadcrumbList for navigation
• Organisation schema for company credibility

4. Rank on Google First

• Target keywords with 100-1,000 monthly searches first
• Build 10+ backlinks from relevant sources
• Maintain on-page SEO best practices
• Achieve top 10 ranking (minimum) before expecting AI citations

Content Structure for AI Citation

AI engines read your HTML, not your design. A page with clear headings, direct answers and data in lists or tables is easier to lift a correct answer from than one with the same facts buried in long paragraphs.

The short version is item 2 of the GEO ranking checklist. This is the detail behind it.

Use a clean heading hierarchy

One H1 for the page title, H2s for the main sections, H3s for sub-topics inside them. This shows a model how the ideas relate. A page with no headings leaves it guessing where one topic ends.

Answer the question first

Open each section with one or two sentences that answer the question its heading asks. Put the context after. Compare:

• Vague: "In the modern world of digital marketing, there are many factors to consider when thinking about how content gets found, and freshness has become an increasingly important topic."
• Direct: "Content freshness affects whether AI engines cite a page. Update your most important pages regularly, show the last-updated date on the page, and keep the dateModified value in your schema accurate."

Put comparisons and steps in lists and tables

Lists and tables are easier to extract than paragraphs. Use a numbered list for steps, a table for comparisons and pricing, and bold the key term at the start of a definition, followed by the definition itself.

Keep paragraphs short

One idea per paragraph, backed by one piece of evidence. Long blocks are hard to quote without cutting them.

E-E-A-T for AI Citation

Google uses E-E-A-T (Experience, Expertise, Authoritativeness, Trustworthiness) to judge content quality, and AI engines that pull from Google's results inherit much of that judgement. Pages with no visible author, no sources and no evidence of real experience give an engine little reason to trust them. These are the signals to make visible.

Experience

Show that a real person has done the work: case studies, first-hand observations, and an author bio with relevant credentials. Add author schema with sameAs links to the author's LinkedIn profile and any professional body listing. For South African businesses, name your professional registrations (for example SAICA, LSSA or ECSA), the years you have operated locally and any relevant accreditations.

Expertise

Depth beats breadth. A focused guide that covers one topic properly is more useful than a long "ultimate guide" that skims ten. Original data, your own examples and a clear point of view are things another site cannot copy.

Authoritativeness

Authority comes from who mentions and links to you. Links from South African media, industry bodies, universities (.ac.za) and government sites (.gov.za) carry weight. List awards, speaking slots and published work on your About page.

Trustworthiness

Cite your sources with links, display your physical address, company registration number and contact details, and keep a visible privacy policy that reflects POPIA. Avoid claims you cannot back up. "The best SEO agency in South Africa" with nothing behind it does more harm than good.

Technical Foundation for GEO

None of the content work matters if AI crawlers cannot reach the page. Four checks:

• Check robots.txt for AI crawlers. Make sure you are not blocking GPTBot, ClaudeBot, PerplexityBot or Google-Extended unless you mean to. Some hosting and security plugins add blocks by default, so read the file rather than assuming.
• Consider an llms.txt file. This is a plain-text file at your domain root that lists your key pages. It is cheap to add, but no major engine has confirmed that it reads it, so treat it as optional rather than a ranking lever.
• Add Article or BlogPosting schema with datePublished, dateModified and author on every post, and keep dateModified honest.
• Keep the site fast and on HTTPS. Slow pages hurt users and crawling alike. Our Core Web Vitals guide covers the fixes.

Then add South African context wherever it is true. Reference SARS, Stats SA, the SARB or the relevant regulator where it applies, because a page that names the local source is more useful to someone asking a local question.

Questions Google AI Overviews Favor

AI engines prefer answering:

• Comparison questions: "A vs B" (AI synthesises multiple sources)
• How-to questions: Step-by-step content is ideal
• List questions: "Top 10 X" or "Best practices for Y"
• Definitional: "What is GEO?"
• Numerical: "How much does X cost?" (with pricing tables)

AI vs. Google: Which Should You Optimise For?

Optimise for Google first. Here's why:

• Google AI Overviews still send traffic to sources (unlike ChatGPT)
• Google ranking signals translate to AI citations
• Good structure for Google = good structure for AI
• Most AI models are trained on Google-indexed content

Don't abandon traditional SEO for GEO. They're complementary.