iCloud is bassicly a service that allows you to sync some of your files such as photos and documents with iCloud. I am going to teach you how to setup iCloud.
First go to settings on your device. Click iCloud. Now you should see a screen asking for your Apple ID and password. Enter your Apple ID and password and click sign in. After you have signed in, you can choose what you want to sync with iCloud. You can choose options such as mail, contacts. calendars, reminders, notes and more. If you sync Documents & Data and have iWork apps on your device such a Pages, Keynote and Numbers, I think you can sync your documents with iCloud. If you sync Photo Stream, and you take a photo on your device. It should automatically be synced with iCloud.
