Zalgo text is a unique kind of text (also known as 'zalgo typeface') that features strange and unusual effects. It can be used to create some interesting and sometimes even horrifying text on the screen. Zalgo text might not be something you want to use on a regular basis, but it can add some extra pizzazz to your typing if you're feeling bold enough.
Zalgo text is the phenomenon in which the letters are "glitched" together to form a string of symbols. It is often thought to be a form of internet trolling, but it has become something of an artform with many people using it for artistic purposes.