This feature is not currently rolling out widely—it's available in search labs, which means you have to manually enable it. Anyone can opt in to the new Audio Overview search experience, though. If you join the test,

Google yesterday began letting people turn online searches into conversations, with generative artificial intelligence providing spoken summaries

Google pitches Audio Overviews as a 'convenient...way to absorb information,' but it's also another way to kill traffic to the sources of information Google uses to generate these AI podcasts.