What is the significance of stack height in the design of running shoes?

The stack height of a running shoe refers to the thickness of the midsole cushioning between the foot and the ground. It is significant because it affects the shoe's cushioning, stability, and overall feel. A higher stack height typically provides more cushioning and shock absorption, while a lower stack height may offer a more responsive and stable ride. Finding the right stack height for your running style and preferences can help improve comfort and performance.