Why is an achievement an important value?

As you start to achieve your goals you'll experience increased motivation to achieve which makes you more productive and effective, driving you toward completing your goal much quicker

having some acheivement in life has an important value because it motivates us to work harder in life, it strengthens our determination and when we are depressed and demotivated with failures of life then we can relish our success and achievement and move on with the failure as our stepping stones to success