It helps one to know what should one be living for. It gives substance to live. "mean" = "intent". Your live has an intent.

Everything exist for a purpose. The sun is not there to do nothing. It provides light. The flower is there to "blossom" and continue to populate itself, just like your pen name.

You are here for a purpose. You are loved. You are needed. Your live have meaning to others around you. Without you, the world will be different.

You might or might not know it, your live has it's meaning, and you want to fulfil it. That's why you write, and share your thought. You are special.