Through concentration and meditation you become the boss of your mind and gain the ability to tell it when to be active and when to stay silent.
This is harder than it sounds. Sometimes I think I have a bit of ADD and I think many other people do as well. I am easily distracted, wait, there goes a squirrel! My ability to be distracted has increased significantly with the acquisition of a smart phone. My smart phone is basically a pocket computer. The thing I do the least with my phone is talk to other people. I update my Facebook status, Google information, or check my steps on my Fitbit app. Occasionally, when I am in the right place in the right time I use one of my meditation apps. With the exception of the meditation apps, all of these distractions make concentration more challenging. Meditation is more of an antidote for my ADD than a spiritual practice. With or without smart phones most of us have over-active minds that are way over-stimulated. My mind has a mind of its own. A few weeks ago when I went to Red River Gorge I sometimes had no internet or telephone service. In our connected lifestyles this can give us a moment of panic. It can also be kind of a blessing. If you want to quiet your mind, spend some time in nature. It is good to dis-connect, quiet your mind, and be silent.