OneNote 2016 for Windows is approaching end of life and is being replaced by OneNote for Windows 10. This chart explains the different choices and options available in a simple to follow format. For more detailed information check the companion article - OneNote for Windows 10 replacing OneNote 2016 Overview.
There are two OneNote applications for Windows and Microsoft have decided to pursue the Windows 10 application, which could have considerable impact. This chart explains some of the main factors with how users should prepare.