They are pretty unique. Many of them were actually developed for it. But I wouldn't even know where to begin to explain this to a layperson without knowing their level of education first. Like, how much do you know about Dyson series? Path integrals? Wick rotations? You're basically asking for a graduate level lecture on numerical methods in quantum field theories. If you really want to know the details, a quick google will probably net you some books or lecture notes.