How does AI Mode work?
AI Mode breaks a question into smaller parts and searches for each one at the same time. Google says it "divides your question into subtopics and searches for each one simultaneously," then combines what it finds into one answer with links. When Google isn't confident in an AI answer, it may show a set of web links instead.
People open it by choosing AI Mode on google.com or in the Google app, or by going to google.com/ai. Google also lets people continue from an AI Overview into AI Mode on mobile. Like any AI answer, it can be wrong: Google's own help page says "AI responses may include mistakes."