OneNote is a notebook application in Microsoft Office series products, and users can record their life and work at will. Can be used in various occasions, business people in the office, students and friends studying in the classroom, and even busy being a delicious housewife in the kitchen. Users can use OneNote to record their work plans, study notes, private recipes, etc., and view them synchronously between devices anytime and anywhere. In addition, Microsoft has previously launched the Office Online online office service, which also has built-in OneNote Online as the online version of OneNote.

OneNote not only supports Windows and Windows Phone platforms for free, but also supports devices on Android and iOS platforms. OneNote has officially landed on Mac devices, and Mac users can also use Microsoft's notebook application.

As a product of Office, OneNote is also inextricably linked with Office. Earlier, it was reported that Microsoft may not release the Mac version of Office before the end of this year, and the preemptive landing of OneNote is bound to be the first force sent by Microsoft for the new generation of Office to land on the Mac.