You will need an Apple ID if you want to use iCloud or Apple Email or to purchase apps from the App Storeor songs from iTunes Store.
Creating an Apple ID
To create an Apple ID, open Safari and go to the following website:
From there create an Apple ID by filling in the forms, then click Create Apple ID.
iCloud is an online data storage service provided by Apple that allowsusers to house data (i.e., music and iOS applications) on remote servers. This data can then be downloaded to a device of your choice, such as an iPod touch, iPhone, or iPad. iCloud synchronizes email, contacts, calendars, bookmarks, ...