Office Web Apps is the online companion to Office Word, Excel, PowerPoint, and OneNote applications. It enables users, regardless of location, to view and edit documents in a browser. When used together with SharePoint 2013 on-premises, Office Web Apps provides updated versions of Word Web App, Excel Web App, PowerPoint Web App, and OneNote Web App. In addition to new features in Office Web Apps, the architecture and the deployment method have also changed. Let see together What's new there!