What Are GEO and AIO? Building an Event Website AI Search Can Read and Cite

GEO (Generative Engine Optimization) and AIO (AI Optimization) are the work of making your pages readable and citable inside AI-generated search answers. Why it matters: if someone searches for your event and gets last year's date, the wrong venue, or no registration deadline in an AI answer, a lower blue-link ranking is not the biggest problem. Search no longer presents only a page list — it reads several sources, composes an answer, and attaches citations.

Start with the goal, not the acronym

GEO stands for Generative Engine Optimization. The GEO paper published at ACM KDD 2024 formalized the term around source visibility inside generative search answers. AIO is a loose practice and marketing shorthand that different vendors expand as AI Optimization, AI search optimization, and similar phrases. It is not an industry standard.

This is not a separate magic layer. Google's official guide updated in July 2026 says GEO and AEO are still SEO from Google Search's perspective. AI Overviews and AI Mode do not require special markup or a dedicated AI file. Search technical requirements and helpful, people-first content still apply.

What the research says, and what it does not

The GEO paper evaluated a benchmark of 10,000 queries. In that setting, content strengthened with sources, relevant quotations, and statistics improved visibility by as much as 40% under some conditions. Tests on Perplexity also improved selected metrics, while keyword stuffing performed worse than the baseline. Results varied by domain.

Those numbers describe a specific experimental setup, not a formula that guarantees growth for every website. Models and search indexes change, and platforms do not publish the full process used to select sources. GEO is best understood as preparing the conditions for official information to be discovered and used as evidence, not as a guaranteed ranking product.

Publish the event facts first

Verifiable facts matter more than polished slogans. If an attendee can answer a question from the page without calling the organizer, an AI system has a better chance of finding the same answer.

• Official event name, date and time, venue, organizer, and host
• Who the event is for and what attendees can expect
• Speakers, sessions, timetable, and schedule changes
• Registration method, deadline, price, and cancellation policy
• Transport, parking, admission process, and contact details
• Original sources for claims, including past event cases and statistics

Some pages are hard for AI to read

• The date and venue exist only inside a poster image
• The home, notice, and registration pages show conflicting schedules
• The page repeats vague claims without saying who the event serves
• Important pages have no internal links or block crawler access
• Structured data does not match the information visible on the page

OpenAI's publisher guidance says OAI-SearchBot must not be blocked if content is to be considered for summaries and snippets in ChatGPT search. Google likewise recommends keeping pages crawlable and indexable, putting important information in text, using internal links, and matching structured data to visible content. Strong copy cannot be used if a crawler cannot reach it or the key facts live only in an image.

What to measure instead of rank

The useful questions are which page was cited for which topic, and whether that visit led to an inquiry. AI Performance in Bing Webmaster Tools reports citations, cited pages, and sampled grounding queries. OpenAI adds utm_source=chatgpt.com to ChatGPT search referrals. If inquiry events are configured, GA4 can use that parameter to analyze which of those visits led to inquiries or quote requests.

An official website matters even more when an event is not buying ads. A well-maintained schedule, speaker list, venue guide, and registration page can keep working across search results, AI answers, and shared links. Visibility cannot be guaranteed, but you can build a discovery path that does not begin with another paid impression every time.

The service is not limited to websites in Korea. We can improve an event website serving attendees anywhere in the world by reviewing its target language, market, and search environment. Korean developers you can trust handle the project directly, and English or multilingual pages can be included in the agreed scope.