What is Office 365
Think of it as your familiar Microsoft Office, only better. Office 365 is the same Office you already know and use every day. And then some. Because Office 365 is powered by the cloud, you can get to your applications and files from virtually anywhere—PC, Mac, and tablets—and they're always up to date. Same goes for updates to features—you get them automatically.
Office 365 includes online versions of Word, Excel, PowerPoint, and OneNote plus Skype for Business (instant messaging) and OneDrive (cloud-based storage). In addition to the online versions you have the option to download these applications on up to five different devices. See the Office 365 applications section below for more information.