Although it seems that walking correctly should be something everybody does automatically, it's not.
Most people walk with small, but very significant structurally unsound movements.
It seems impossible, or ridiculous, that how you walk might be why you have pain, or why you have a double chin, or saggy buns, or a potbelly. Changing the way you walk can absolutely improve your level of fitness, eliminate structural pain, and help you look better. The system is a combination of simple gait corrections and exercises that corroborate those corrections. There is a standard for walking. And every person has their own 'walk' that wavers from that standard in one or more ways.