Do you know that protrusions on the sole of a shoe is called cleat?
No i dont, wow, so why is it called a cleat?
They are called cleat because  they  provide additional traction on a soft or slippery surface.
wow, good to know, do you prefer flat shoes or hilly shoes?
Flat works for me. In the USA,  we use synecdochically to  refer to shoes featuring such protrusions