The object of mindfulness is to learn to pay attention. We think we are doing this already, but that is often an illusion. Through the process of mindfulness, we slowly become aware of what we really are. We wake up to what life really is. Life has a much deeper texture than what we usually notice, if we take the trouble to look, and if we look in the right way.
Formal meditation practice helps us re-establish our mindfulness at regular intervals. We withdraw from those events which constantly stimulate the mind. We back out of all the activity that prods the emotions. We go off to a quiet place and we sit still, and it all comes bubbling out. Then it goes away. The net effect is like recharging a battery.
Meditation recharges your mindfulness.