How does Google's AI Overview get its information

https://organized-pullover-c06.notion.site/Great-topic-AI-is-reshaping-organic-discovery-and-brand-visibility-in-the-US-in-ways-most-marketers--2ad1824cad56803d8e88ea7320efd94d?source=copy_link

SGE data sources in AI Overview: How Google compiles answers As of April 2024, roughly 56% of Google searches end without a click to a website, thanks to AI-driven answer boxes now dominating the results page