It boosts your energy:

• Walking helps improve your blood flow through your body. It particularly helps improve your blood flow in your brain and muscles. The increase of the blood flow benefits us by helping us feel more energized, which is the same feeling our bodies experience after we workout. Exercise is your best natural remedy to increase the amount of energy you have through the day.  If you walk for 20 minutes that same energy can last up to 12 hours of energy