The main feature of this package is to remove the burden of level design, where you put some of your objects a little bit below of ground or maybe a little bit left or right on the wall. Just open up the editor window from Tools > Snaps > Open. The editor window is very layout friendly, meaning you can dock it like other layouts. 

The editor window has 6 buttons and 3 enum PopUps. Select the required snapping properties and press the button, there you go. Your object is perfectly placed on the surface without any of its parts going below ground or going inside of the wall.