https://support.google.com/websearch?p=aimode

Google Search’s AI Mode is an conversational, agentic interface powered by Gemini 3.5 Flash that enables multi-step research, subtopic breakdown, and integration with personal data. Available for personal accounts, it requires turning on Web & App Activity and allows for multimodal queries via text, voice, or image. Learn more at the Google Search Help Center. Get AI-powered responses with AI Mode in Google Search