If this helps, it's designed for unstructured information storage, so fundamentally you use it as you'd use a notebook with the exception that organisation is something you can do ad-hoc. For example ...

Have you ever found yourself staring at a blank page, unsure of how to organize your thoughts or where to even begin? Whether you’re juggling work projects, managing school assignments, or simply ...

Microsoft OneNote is a note-taking app that makes it easy to access notes, images, and more across your devices. Lesser-known OneNote features include the ability to scan documents and solve complex ...