Why do we exist?

Getting human life is a rare opportunity. Therefore, we should not waste our lives away. We should perform meritorious deeds, and work for the welfare and happiness of all sentient being.

i guess in my own opinion we do exist because God made us here(faith)..and surely He empasizes that we should multiply sort of thing...and enjoy what we have and be contented on it...

i dont know exact reason why i exist but i can surly tell you that i have my value in this world~~~ i am my parents' son,i have the value to accompany them and consolate them when they are in need i am my friends' friend, i hold the value of showing friendship and care to them and so on~~~~ every person has a reason to be in this world,lol,but the problem comes to :what is the reason.