What is AI search?
AI search refers to search systems that answer queries directly with generative AI instead of only showing a list of links. A language model condenses content from the web into a coherent answer and links the sources it used. AI search includes AI Overviews and AI Mode in Google Search, ChatGPT search, Perplexity, and Gemini.
Which AI search systems exist?
Six systems shape AI search today:
| System | Provider | Key trait |
|---|---|---|
| AI Overviews | AI summary that appears automatically above the classic search results | |
| AI Mode | Dedicated chat mode inside Google Search, rolled out internationally since 2025 | |
| ChatGPT search | OpenAI | AI assistant with built-in web search and source links |
| Perplexity | Perplexity AI | AI search engine that backs every statement with citations |
| Gemini | AI assistant with direct access to Google Search | |
| Copilot | Microsoft | AI assistant built on the Bing index |
All six systems work on the same principle: a search index delivers the facts, a language model writes the answer.
How does AI search work?
AI search combines a classic web search with a language model. The process follows four steps:
- Break down: The system splits the query into subquestions. Google calls this technique “query fan-out” in AI Mode.
- Retrieve: The subquestions run against a search index; the most relevant pages are loaded as context.
- Write: A large language model composes a coherent answer from the results.
- Cite: The pages that were used appear as source links in or next to the answer.
This interplay of live retrieval and language model is called Retrieval-Augmented Generation (RAG). It anchors the answer in current web content and reduces invented claims.
What sets AI search apart from classic Google Search?
Classic search delivers links, AI search delivers answers. Three shifts follow from that:
- Mention instead of position: Success no longer means ranking first in a list, but being cited as a source in the answer.
- Dialog instead of single queries: Follow-up questions keep the conversation context; a search becomes a session.
- Fewer but better clicks: Many queries end without a website visit, a trend described by zero-click search. Those who still click arrive with concrete intent.
The foundation stays connected: AI search systems draw from the same indexes as classic search. What cannot be crawled and indexed cannot feed an AI answer either.
How does your website become visible in AI search?
Visibility in AI search comes from content that a language model can understand, extract, and cite. Four levers work across all systems:
- Citable answers: Every important question gets a self-contained answer in the first sentence of its section.
- Clear entities: Unambiguous statements about your brand, people, and services make your content identifiable as an entity.
- Structured data: Structured data in JSON-LD format delivers facts in machine-readable form.
- Accessibility for AI crawlers: The crawlers of AI systems must be allowed to fetch your pages; blocked content never appears in an answer.
This work is bundled in the discipline of Generative Engine Optimization (GEO). Our guide on ChatGPT SEO and our GEO optimization for AI visibility show how to approach it in practice.
Frequently asked questions about AI search
Does AI search replace classic Google Search?
No. The classic search results remain and provide the foundation: AI search systems build their answers from the results of a search index. The share of directly answered queries keeps growing, though.
Is AI search the same as AI Overviews?
No. AI Overviews are one form of AI search: the automatic AI summary above Google’s search results. AI search also includes AI Mode, ChatGPT search, Perplexity, Gemini, and Copilot.
Where do AI search systems get their information?
From two sources: the training knowledge of the language model and a live search index. For current questions, the systems fetch web pages at runtime and link them as sources.
Can I measure whether AI search brings visitors?
Partially. ChatGPT and Perplexity send a recognizable referrer that shows up in web analytics. Google, however, does not report clicks from AI Overviews and AI Mode separately; they count toward the normal search data.
Welt der SEO lernen?
