Note: SkyDrive is now OneDrive, and SkyDrive Pro is now OneDrive for Business. Read more about this change at From SkyDrive to OneDrive.
Note: Office Online was formerly known as Office Web Apps.
Saving Office Starter documents on your OneDrive enables you and others to view and edit the documents in a Web browser, using Office Online. This means you can share your document with people without worrying about what program they have installed, because they view and edit the documents on the Web in their browser.