It could be required when you need to type specific text paragraph in uppercase, we had recently posted about how to hide touch keyboard in ipad while typing.
In order to type a single word in uppercase, just tap the shift [ upwards arrow key ] once, but if you want to turn caps lock on Double-tap the Shift key. The Shift key turns blue, and all letters you type are uppercase. Tap the Shift key to turn caps lock of.
Caps Lock On In iPad
Note: You can turn this feature on or of in Settings > General > Keyboard
Related – More iPad Tips and Tricks