If you’re reading this, you can start right now with Office Web Apps. Sign in at skydrive.com, and click the icon for the kind of document you want to create.
Office Web Apps let you create and share online Word documents, Excel workbooks, PowerPoint presentations, and OneNote notebooks in your web browser. Your friends will be able to open these docs in their browser, too. Instead of emailing an attachment, send a link to the online document.
Put the documents you already have online
Documents you’ve already created get the same benefits—just store them in your SkyDrive. Upload them from your computer, use the SkyDrive app on your device, or if you have Office 2010 or later, you can save documents directly to SkyDrive from Word, Excel, PowerPoint, and OneNote.
Online documents for work or school
SkyDrive.com is an easy way to use Office Web Apps, especially for your personal docs. For your business docs or college assignments, however, use Office Web Apps as part of your organization’s Office 365 plan or SharePoint site. Store docs in your SkyDrive Pro library or team site, and share them by sending a link instead of an attachment. When people click the link, the document opens in their browser.

Note Not all Office 365 plans and SharePoint sites include Office Web Apps. What’s available depends on what’s been configured by the person in charge of Office 365 or SharePoint in your organization.
If you are a system administrator, learn how to deploy the Office Web Apps Server for your organization.