Google uses its Gemini AI model to automatically generate written summaries — called 'AI Overviews' — at the top of many Search results pages, and deployed a dedicated 'AI Mode' tab for deeper, multi-turn conversations within Search. As of mid-2025, AI Overviews reach over 2 billion monthly users globally, and AI Mode reached 75 million daily active users by December 2025.

AI Overviews launched broadly in the U.S. in May 2024 and expanded to 100+ countries by October 2024. They are powered by a custom Gemini model and generate an AI-written snapshot of information before showing traditional web links. AI Mode, a more conversational tab within Search, launched for all U.S. users at Google I/O in May 2025 and expanded to 200+ countries and 35+ languages by October 2025. Both features use a 'query fan-out' technique — issuing multiple related searches simultaneously to compile a response. Gemini 3 became the default model powering both features in early 2026, and AI Mode reached 75 million daily active users by December 2025.