Concentration means focusing your undivided attention on one single thought, action, or project, in accordance with your will and decision, for a certain length of time, while ignoring distractions and unrelated thoughts.
Concentration is one of the pillars of inner peace. When this ability is well-developed, inner peace becomes easier to achieve.
If you wish to improve your life and to achieve success in any area of life, you need a certain degree of concentration.
I am sure you know what are the benefits of being able to focus your mind. I know how frustrated and unhappy you can become, if you are not able to focus your attention when you need to.