I assume you’re playing through your browser? It seems to be a problem with Godot’s built-in tooltips on the web player, they work correctly on the Windows build. I might move that whole sidebar to the left side of the screen to get around the issue.
To summarize the options:
The “batches” option divides the goblins up so that they can’t all recalculate their pathfinding and other complicated job-selection behaviors on the same frame. Higher batch count = better performance. Going too high can potentially cause pathfinding issues.
“Max population” is pretty straightforward, although it doesn’t know how big a goblin’s pregnancy is going to be before giving her permission to get pregnant, so for example you could have a goblin get pregnant with triplets when you’re already 1 away from the limit.
“Safe sex” prevents goblins from having sex if there’s a chance of pregnancy, unless at least one of the goblins participating is marked with “encourage breeding”.
“Shoving” makes goblins push each other away if they’re piled on top of each other. Turn it off if you’re having framerate issues, as the collision detection has some overhead.