My turbo has lowering springs. Can someone simply define what coilovers are and do, and how do I benefit from non track driving. How do they effect the look of the car versus lowering springs? What is corner balancing? Does it matter how the roads are in your area?

 

Here is what little I know about coilovers.
They allow for a lower drop than just springs. The shocks that go with them can be adjustable and it also allows for a somehwta smoother ride than just lowering springs alone.