The GEO guide: how to get your store cited by ChatGPT, Perplexity, and Gemini

What is generative engine optimization?

Generative engine optimization (GEO) is the practice of making your brand and products easy for AI answer engines — ChatGPT, Perplexity, Gemini, Claude — to understand and cite. Where SEO optimizes for a ranked list of links, GEO optimizes for being the source an AI quotes when it answers a question like "what's the best serum for oily skin?".

How do AI answer engines choose which sources to cite?

They retrieve pages that are relevant to the question, then prefer the ones that state the answer plainly and can be trusted: a clear definition or recommendation near the top, specific facts (ingredients, sizes, prices, policies), and consistency with other sources. A page that opens with a benefits paragraph often loses to one that opens with a direct answer.

Can AI crawlers read my site?

Check your robots.txt. If it blocks GPTBot, PerplexityBot, ClaudeBot, or Google-Extended, those engines can't read your pages and won't cite them. Also check that your product and category content is in the server-rendered HTML — many AI crawlers don't run JavaScript, so content that only appears after scripts load is invisible to them.

What content gets cited?

• One clear answer per page, near the top. Start with the definition, recommendation, or fact the page exists to provide.
• Question-style headings. "Is this serum safe for sensitive skin?" gets pulled into answers far more often than "Product details".
• Specific, checkable facts. Sizes, materials, prices, shipping and return policies — the details an assistant needs to recommend you confidently.
• Comparison and guide content. Buyers ask assistants to compare; pages that compare honestly are natural sources.

Which technical signals help?

• Structured data — Product, FAQPage, and BreadcrumbList schema describe your pages in machine-readable form.
• An llms.txt file — a short Markdown map at your site's root pointing AI systems to your most useful pages.
• Clean internal linking — every important page within a few clicks of the home page, so crawlers find it.

How do I measure GEO?

Direct attribution from AI answers is rarely possible. Instead, track how often your brand appears in answers to the questions your buyers ask (ask the assistants regularly, or use a monitoring tool), and watch for movement in branded search and direct traffic.

What should I do first?

1. Make sure AI crawlers aren't blocked and your key content is server-rendered.
2. Rewrite the top of your most important category and product pages to answer the main question in the first sentence.
3. Add Product and FAQ structured data.
4. Publish an llms.txt pointing to your best pages.

How does Posta help?

Posta's SEO/GEO agent reviews your site's crawler access, structured data, and content clarity, and ranks what to fix. Run it on your store from the free audit, or see SEO for classic search work.