Backing up your iPad using iTunes is essential. Regular backups insure that your data will be saved to a computer in the event something happens to the iPad. iTunes will restore from the backup file if necessary.
But what exactly does iTunes back up? Here's a complete list.
iPhone OS 3.2.0
- App Store Application data (except the Application itself, its tmp and Caches folder)
- Application settings, preferences, and data
- Autocorrect dictionaries
- Autofill for webpages
- CalDAV and subscribed calendar accounts.
- Camera Roll
- Home screen layout and web clips
- In-app purchases
- Keychain (This includes email account passwords, Wi-Fi passwords, and passwords you enter into websites and some other applications. The keychain can only be restored from backup to the same iPad. If you are restoring to a new device, you will need to fill in these passwords again.)
- Mail accounts
- Managed Configurations/Profiles
- Map bookmarks, recent searches, and the current location displayed in Maps
- MobileMe and Microsoft Exchange account configurations
- Network settings (saved Wi-Fi hotspots, VPN settings, network preferences)
- Offline web application cache/database
- Paired Bluetooth devices (which can only be used if restored to the same iPad that did the backup)
- Per-app preferences allowing use of location services
- Safari bookmarks, cookies, history, and currently open pages
- Trusted hosts that have certificates that cannot be verified
- Websites approved to get the location of the device
- YouTube favorites