iCloud, included with iOS 5, iOS 6, and OS X 10.7.2 and above, is a service in which all your Photos (via Photo Stream), iTunes Music, Contacts, Calendars, Apps, Backup Data, and more are pushed across all your devices (iPhone, iPad, iPod touch Mac, or on the web at iCloud.com). iCloud comes with 5GB storage and iCloud Mail with an @me.com and @icloud.com format (no ads) and Find My iPhone- Free. To learn more, visit www.apple.com/icloud
It's a place to store things from your I device. That's why is "ICloud". It will save all your stuff you want and if you reset your i device u put your apple I'd in then you u can get it back. Quite handy.