Close iPad apps not being used

The iPad doesn’t need you to close a running app for every instance. But in some cases like playing a game, you may need to actually close the app in order to start a new level rather than continuing the last. Here are the steps to follow:
1. Click your iPad’s Home button to minimize the app if it’s running.
2. Double-click the Home button to see a row of running apps at the bottom of the screen.
3. Touch and hold any icon until the icons start wiggling, then tap the minus sign on the icon of the running app to close it.
4. Double-click the Home button again to hide the row.