I just downloaded it. Besides creating a file, typing some stuff. I don't understand how it works or what it's meant to do... Quick google search, I can't figur

I just downloaded it. Besides creating a file, typing some stuff. I don't understand how it works or what it's meant to do... Quick google search, I can't figure it out... Am I missing something? The video on the website, I can't even... So confused :(