If you find the need to restore your device to a prior backup that you made to your computer through iTunes native device backup this is how it is performed. This should happen automatically if the device is set to iTunes backup management instead of iCloud...
Many people unfortunately do not know how to even check if their device is being backed up let alone where it is backed up. For most, it will be set to iCloud. You must ALWAYS back up to iTunes or iCloud which is independent from our app data backup to...
This is a basic tutorial on how to reset a device (erase it and then restore). Then restore the device using an iCloud backup. ***NOTE: This method also works if you have had iCloud backups and you get a NEW iPad or iPhone, please watch this...