Google has removed the 'experimental' label from its AI tool, NotebookLM, signaling its transition to a fully-fledged product. NotebookLM allows users to generate AI-hosted audio podcasts on any topic, and the latest update introduces features like 'Pass a note to the hosts' and 'Custom Instructions' that enable users to guide AI-generated audio conversations by customizing the focus and expertise level of the AI hosts. The tool leverages powerful multimodal models like Gemini, contributing to its success in transforming how users interact with AI-generated content. The platform has seen rapid adoption, with millions of individual users and usage by over 80,000 organizations. Google is also launching 'NotebookLM Business' via Google Workspace and is working on a mobile app for NotebookLM. The ability to personalize AI-generated podcasts has been widely praised, with users noting the potential impact on content creation and podcasting.