Article: In order to download update software for your iPad, iTunes must be running the latest version available. ack up your iPad. In most cases, updating the iOS will not cause a loss of data, but things can occasionally go wrong. Use the cable that came with your iPad, plugging the USB end into the computer and the Lightning or 30-pin connector into your iPad's charging port. If iTunes doesn't launch automatically, open the iTunes app on your computer. It's in the upper-left part of the window, below the toolbar.  If there is an update available, iTunes will ask you if you want to download and install it. iTunes will automatically begin downloading the update and will install it after the download is complete.  Your iPad must remain connected during the entire download and install process.  iTunes must be connected to the Internet during the entire process.

What is a summary?
Download the latest version of iTunes. . Connect your iPad to your computer. Click your iPad's icon. Click Summary in the left pane. Scroll down and click Check for Update. Click Download and Update.