This option is good for optimization; you can make your new objects static when they are placed. You can read more about the static object at this link: https://docs.unity3d.com/Manual/StaticObjects.html
Show Clipping Bounds
This option allows you to see the clipping bounds radius when you are painting. It can be useful if you want to have more control over your brush when using the multiple painting mode.
Show Brush World Lines
Show guidelines on all the axes (X Y Z), It can be useful if you want more precision over your object placement.
