What is a Microsoft account?
Your Microsoft account is what you use for almost everything you do with Microsoft devices and services. With one sign in, you can use Skype, use your Office 365 subscription; buy games, music and films from our participating stores; and access all of your photos, videos and documents on OneDrive. Your account consists of an email and password, plus your profile info, privacy settings, communications preferences, and your billing and payment details.
Here are just a few of the benefits of using a Microsoft account: Your settings, address book and documents can follow you to any device, you can get millions of free streaming songs, unlock a world of apps and get the power of gaming right on your desktop.