It's a single entry point into the Office ecosystem, allowing you to open Word, PowerPoint, or Excel documents straight through the app without having to install each app individually.
I'm no expert concerning Microsoft's productivity suite of Word, PowerPoint, and Excel, but it appears that Microsoft has packed most (if not all) of the functionality from those dedicated apps into the new Office app, but in a mobile-friendly way.
If you'd like to play around with this new Office mobile app, Microsoft launched a public preview for Android and iOS today. iOS users may have a harder time gaining access, though, as Apple limits public previews to 10,000 users. With that in mind, the Office app was created to allow users to take a picture of a document and automatically turn it into a Word file. You can also see your recent media or your notes from Sticky Notes on the app.
Create automatically enhanced digital images of whiteboards and documents with Office Lens features integrated into the app. The inbuilt conversion feature will efficiently convert photos, Word, Excel, photoshop, or Powerpoint file to PDFs. It will be interesting to see how that pans out, since now Microsoft requires Office 365 subscriptions to edit in its Office apps on iPads over a certain size, while devices under that size can edit documents for free. You can also create a new one, or use Actions to create or sign a PDF, scan QR codes, and more. As they can easily make assignments on their mobile phones in case if they do not have laptops or computers. Well, there are improvements in store for anyone who frequently uses any Microsoft Office apps on their Android phones.