How to Update Software on Your iPad
Apple occasionally updates the iPad system software to fix problems or offer enhanced features. You can also tap Settings→General→Software Update to update your software. If you’re not using the iCloud feature, which updates your iOS automatically, or if you prefer to look for updates yourself in iTunes, you should start by connecting your iPad to your computer. Then follow these steps:
On your computer, open the iTunes software that you installed.
Click your iPad in the iTunes Source list on the left (in iTunes 12, click the Devices button at the upper left and select your device there).
Click the Summary tab.
Click the Check for Update button. iTunes displays a message telling you whether a new update is available.
Click the Update button to install the newest version.
If you’re having problems with your iPad, you can use the Update feature to try to restore the current version of the software. Follow the preceding set of steps, but click the Restore button instead of the Update button in Step 6.
You can also use the iTunes Wi-Fi Sync feature (tap Settings→General) to sync wirelessly to a computer that has iTunes installed.