Find My iPad is a must have feature, both for your privacy/security and for your wallet. It allows you to remotely locate, lock or erase a lost or stolen iPad using iCloud. To turn it on, simply go to Settings -> iCloud and toggle on Find My iPad. You probably want to turn on Send Last Location as well, as it will have your iPad send its whereabouts when the battery is about to die. See here for instructions on how to use the service.
How do I turn on Find My iPad in iOS 8?
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