A type shifter is like a magic trick that changes the way words or letters look. You know how when you put blocks together, they spell different words? A type shifter does something like that but with words already written down.
Imagine your letters are cars - some are small and some are big. The type shifter makes the small ones look big and the big ones look small. It's like when you put a sock on your hand and it looks like a puppet - the sock hasn't changed, but it just looks and acts different. This makes it easier for people to read the words and understand what they mean.
Type shifters are used in many different places, like in books, on signs, and on the internet. They help make things look neat and easy to read.