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Google AI Mode: Query Fan-Out Explained
Source: digiday.com
Published on June 19, 2025
Updated on June 19, 2025

Google AI Mode Reshapes Search with Query Fan-Out
Google’s AI Mode, powered by its Gemini AI model, has introduced a new approach to search called query fan-out. This technique breaks down user queries into multiple related sub-queries, allowing the AI to gather and synthesize information in real time. Unlike traditional search, which relies on matching keywords to webpages, query fan-out focuses on understanding user intent and providing comprehensive, summarized answers.
The launch of AI Mode in the U.S. has sparked curiosity and concern among publishers and SEO experts. While the new feature promises more intuitive search results, it also presents challenges for content optimization and SEO strategies. As Google’s AI Mode continues to evolve, understanding how query fan-out works and its implications for the future of search is becoming increasingly important.
How Query Fan-Out Works
Query fan-out is the backbone of AI Mode’s ability to handle complex user queries. When a user enters a question, the Gemini AI model analyzes the query and identifies its subintents—the underlying goals or related questions that a user might have. For example, a query like “best sneakers for walking” could be broken down into sub-queries such as “best sneakers for men,” “best sneakers for different seasons,” or “sneakers for walking on trails.”
These sub-queries are processed simultaneously, allowing the AI to gather relevant information from various sources. The results are then combined into a single, coherent answer. This process happens in real time, enabling AI Mode to provide users with quick and comprehensive responses. According to AI expert Mike King, query fan-out is designed to anticipate the user’s needs, even if they haven’t explicitly asked for certain information.
One of the key advantages of query fan-out is its ability to handle complex queries that require multiple steps. For instance, a query like “book a vacation for a family of 5 around the U.S.” could involve sub-queries about family-friendly activities, travel routes, and accommodation options. By breaking down the query into smaller parts, AI Mode can provide a more detailed and useful response.
Impact on SEO and Content Optimization
The introduction of query fan-out has significant implications for SEO. Traditional search relies heavily on keywords, where a single query leads to a specific set of results. In contrast, query fan-out generates multiple sub-queries, each with its own set of results. This shift means that publishers can no longer rely solely on ranking for specific keywords to drive traffic to their sites.
According to SEO expert Olaf Kopp, query fan-out focuses on extracting relevant passages from webpages rather than analyzing entire pages. This change requires publishers to structure their content in a way that is easily understood by AI models. SEOs are now tasked with optimizing content for a wider range of sub-queries, which means providing useful information across multiple topics.
However, the lack of transparency from Google regarding the specific queries generated by query fan-out has made optimization more challenging. SEOs are now dealing with the unknown, as they cannot see how their content is being utilized in AI Mode results. This has led to a shift in SEO strategies, with a greater emphasis on providing value and relevance rather than focusing on individual keywords.
Adapting SEO Strategies for AI Mode
As AI Mode continues to evolve, SEOs are adapting their strategies to stay competitive. One of the key challenges is the lack of data on query fan-out searches. To overcome this, SEOs are turning to third-party tools like AlsoAsked and Profound to gain insights into related queries and user intent.
According to SEO expert Mike King, the focus is shifting toward measuring visibility in AI search engines. However, few tools are currently equipped to support this shift. As a result, many SEOs are developing custom tools or relying on platforms like Reddit and TikTok to understand how users are searching. King has also created Qforia, a tool that replicates query fan-out by generating related queries based on Gemini prompts.
Content optimization for AI Mode requires a more focused approach. Experts like Adithya Hemanth recommend using clear language, structured content, and bullet points to make information easily digestible for AI models. Passages should be concise, ideally two to four sentences long, and focused on specific topics. Real-world experiences, such as product review videos and original research, are also valuable for enhancing content relevance.
Ultimately, the goal is to provide useful information that aligns with the user’s search journey. This shift in mindset is essential as AI Mode continues to reshape the search landscape. While some users may still click through to publisher sites for more information, AI Mode responses are likely to capture most of the user intent, reducing referral traffic to external sites.
The Future of Search and SEO
The introduction of query fan-out marks a significant step in the evolution of search technology. As AI Mode becomes more prevalent, publishers and SEOs will need to adapt their strategies to stay relevant. This includes focusing on content quality, user intent, and the ability to provide value across a wide range of sub-queries.
While the future of search is uncertain, one thing is clear: AI-powered search is here to stay. By understanding how query fan-out works and its implications for SEO, publishers can better prepare for the changes ahead and continue to deliver valuable content to their audiences.