iCloud on iPhone 5

iCloud server two main causes:
1.Sharing data
Using your internet connection and the iCloud, you can automatically share your data between all your iOS devices, including your computer, iPad and iPhone.So you can take a photo with your iPad, and it will automatically be added to your iPhone’s Camera Roll and to your Mac iPhoto.
2.iCloud provides online storage
You can now save your documents to your iCloud. You can retrieve your data with any of your iOS devices anywhere as long as you are connected to the Internet. iCloud can alsostore your iPhone’s backup.