I was working on cool gifs for Tolgee's new readme, where we show how simply you can modify a localization string in your App. But when I need to type something into input, I always make like 5 mistakes and my typing is not very nice to look at. So I created a script that types the string instead of me when I hit a specific shortcut. Now I use this to record videos, where I have to fill in some input, and I don't want to record it like 1000 times because I was typing inconsistently.
It can be useful for some pranks if you extend this. But let's leave this to your imagination.