Open the Settings app and tap “Wi-Fi” to find and connect to a wireless network.
Double-tap the Home button to open the App Switcher. Swipe the App Store window up to close it. Return to the Home screen and open the App Store. Try downloading the updates again. Restart your iPad. Press and hold the Power button until the Power slider appears. Slide the slider with your finger and wait for your iPad to turn off. Turn it back on and then try downloading the updates again. Hard reset your iPad. If the updates still aren’t working, try a hard reset to clear your cache. Press and hold the Power and Home buttons until the device shuts down. Continue holding both buttons until the Apple logo appears. Once the iPad restarts, try downloading updates again from the App Store.
Automatic updates will not occur if your iPad is in Low Power mode.