What is Google's AI Overview?
AI Overview is a feature launched by Google that displays AI-generated answers for a query before the search results in its search results page. It's likely Google launched this feature in response to the AI-generated answers that appear on top of the results on Bing. On Bing, however, it's possible to disable these AI responses, while on Google, it's currently not possible.


History
Google's AI overview was launched in May of 2024.
So today, AI Overviews will begin rolling out to everyone in the U.S., with more countries coming soon. That means that this week, hundreds of millions of users will have access to AI Overviews, and we expect to bring them to over a billion people by the end of the year.
https://blog.google/products/search/generative-ai-google-search-may-2024/ (accessed 2024-12-17)