I don't understand what this option corresponds to, what should you specify in this line other than random? Thank you :)

je ne comprend pas a quoi correspond cette option, que doit t'on préciser dans cette ligne autre que aléatoire ? Merci :)

Basically, it's just a way to ensure that you get the same map each time, if you want to.

So if you used 'map' as a seed once and then used it again on your next game, you'd get the exact same generated map as the last game.