..And what is this for?

go on the map enable cheats and copy set pos

And what is the effect if I ever to do these step's correct?

you get teleported to a location with a easter egg that is a reference to a very old version of the orginal freddy's fazber pizza map with events
i have copied my pos (position) in a way your camera faces the same way that mine did so you can see what i saw when inputing the command
you can do this yourself by typeing in the consol "getpos" wich prints out a string of numbers corensponding to your position both on the map and the position of your (mine) pov.
i just wanted to share this fun little easter egg i have found in one of the rooms so i made this duscussion with steps that lead to said easter egg

Ohhh its a turtle and under it says never forget on a old gm fnaf 1 map!