Overview

• The Discover Sources feature now searches file contents in Google Drive rather than just filenames, returning relevant passages to review.
• Google’s support page lists official coverage for Google Docs and Google Slides across files a user owns or has access to.
• Users can issue natural-language prompts like “Slides from Claire” or “Docs about Q4 planning” to locate material and add those files as sources in projects.
• NotebookLM keeps added sources up to date through automatic syncing so changes in Drive are reflected without manual refreshes.
• The capability rolled out quietly in recent weeks, and early testing reported by Dataconomy suggests some PDF content may also be searchable.