SharePoint team site comes with a Notebook link in the Quick Launch. It
opens the Online version of OneNote, Microsoft's note-taking tool that is part of the Office package.
OneNote Online works well in the browser, and by having it in SharePoint you can easily share it with other team members.
The OneNote notebooks are stored in each team site's Site Assets library.
In the demo below Peter Kalmstrom, CEO and Systems Designer of kalmstrom.com
Business Solutions, gives an introduction to OneNote. He opens OneNote
Online via the Notebook link in the Quick Launch and shows the various
options, and he also shows how to create new notebooks.
If you don't want users to have access to OneNote, you can remove the Quick Launch link and existing notebooks in the Site Assets library, but
if you want to remove OneNote from the default options when you create a new document in a library, you need to change the content type
of that library.