How do I download software update?
How do I download the iOS 6 update?
If it's a first gen iPad then you can't install iOS 6. If it's an iPad 2 or 3 and you are currently on IOS 5+ then you should have a Settings > General > Software Update option on the iPad so you can update directly on it - if you are on iOS 4 then you will need to do the update via your computer's iTunes.
Make sure that you've copied all purchases to your computer's iTunes first via File > Transfer Purchases. You may also want to copy photos and any important documents off the iPad as well e.g. via the file sharing section at the bottom of the device's apps tab when connected to iTunes, via wifi, email, dropbox etc - they should be included in the backup, but it's best to have a copy of them outside of the backup just in case. You can then force a backup of the iPad by right-clicking the iPad 'Device' on the left-hand side of iTunes and selecting 'Backup'.
Updating to iOS 5+ : http://support.apple.com/kb/HT4972
iOS 6 will remove the built-in YouTube app and the Maps will change.
