Something along the lines of what usually appears when you flail your hands around on your keyboard. Often used to display excitement, or just strong emotion. e.g. fangirling
OMG (favourite band) IS TOURING AND THEY'RE GOING TO BE AT (nearby large city) AND I CAN GO ASDFKJAFLBFJDBRHFBF
this will come up when you are fiddling around with your keyboard, and this could possibly be a message to aliens, but we will never know. Until then, this is just word spam.
I typed asdflkjh today, because I wanted to add some spice to my boringinternet time.