Sway lets you make stylish media presentations that can be quickly made and embedded on websites. Microsoft has bundled Sway, a tool the company introduced earlier as a standalone service, right into the Office suite. The feature, however, is limited to Word. In addition, when multiple users are working on a document, the participants can see where others are working in a document in real-time. Microsoft says that users can work on a document regardless of the device - read the operating system - they are using. Co-authoring allows more than one user to work on a document simultaneously.
Perhaps the single biggest addition to Office is the introduction of a feature called co-authoring in several of Office applications - Word and PowerPoint.
Features Of Office 365 Pro 1) Co-Authoring