How does iCloud work for iPhone?

It says I have 5 gb available on ICloud I don't understand how to use it though can I store my music ad apps in iCloud so I have more room on my iPhone how do I set it up?

Yes you can store music and apps. Go to your settings and select iCloud, enable it and sign in with your iTunes account. Select what you want to store on the cloud baddabing baddaboom.

Icloud is to store photos documents contacts calendars reminders bookmarks notes and automaticly store them to another iPhone iPod or ipad so you don't have to do them one by one and does a online backup for you if you so choose to