This specific set of characters can cause your home screen to crash on your iPhone or iPad. Here's what you need to know.

Tap Share > Add to Home Screen. Do not enter anything into the Title field (it is filled with a blank character). Tap Add. You now have a blank icon on the home screen.

It also let you turn your home screen apps into widgets and resize those widgets with ease. Before iOS 18, you'd have to delete a widget if you didn't like its size.