OneNote is a digital note-taking application developed by Microsoft. It allows users to create, organize, and share notes in a flexible format. Users can type, draw, or insert images and audio recordings, making it suitable for various types of information. OneNote's notebook structure helps keep notes organized into sections and pages. The application is available on multiple platforms, including Windows, macOS, iOS, and Android. It also syncs across devices through OneDrive, ensuring that users can access their notes anytime, anywhere. OneNote is commonly used for personal organization, project planning, and collaborative work.