The Ribbon contains the set of commands for working in a document, while the Microsoft Office Backstage view is the set of commands you use to do things to a document.
Open a document, and click the File tab to see the Backstage view. The Backstage view is where you manage your documents and related data about them — create, save, and send documents, inspect documents for hidden metadata or personal information, set options such as turning on or off AutoComplete suggestions, and more.
The File tab replaces the Microsoft Office Button and the File menu used in earlier releases of Microsoft Office.
What do you want to know?
Where is the File tab located?
The File tab is located in the upper-left corner of Microsoft Office 2010 programs.
What do I see when I click the File tab?
When you click the File tab, you see many of the same basic commands that you saw when you clicked the Microsoft Office Button or on the File menu in earlier releases of Microsoft Office. You'll find Open, Save, and Print, as well as a new Backstage view tab called Save & Send, which offers multiple options for sharing and sending documents.
The Info tab
The Info tab displays different commands, properties, and metadata depending on the state of the document and where it is stored. Commands on the Info tab can include Check In, Check Out, and Permissions.
Commands in the Backstage view are highlighted depending on how important it is for the user to notice and interact with the commands. For example, Permissions on the Info tab is highlighted in red when permissions set on the document might limit editing.