The iPad’s side switch has essentially two features. It can either lock your orientation or enable silent mode.
I. Tap Settings.
II. Go to General and on the right side you can change what your side switch does.
III. By tapping Mute, the side switch will enable iPad’s silent mode or either disable it. Furthermore, you will be able to lock its orientation from the Control Center.
IV. By contrast, if you select Lock Rotation, you will be able to lock or unlock your iPad’s rotation by using the side switch. If you wish to mute your iPad you can do it by bringing up the Control Centre.
iNerdious 
