Religions are supposed to answer that question. Another way of putting it is "what is the meaning to life (our life)?" I remember when young people used to travel to Asia to find "the answers" from some guru there. Now, young people go to college and study "the liberal arts" inorder to get the answers.
What is your experience?
Good question because how you live your life will be based on that question.
When my daughter was young she said that she intended on doing something for the poor because there was always a possibility re-incarnation was real and she would like to make sure the world was not in too much of a mess if she came back.
I think when people travelled to Asia and I did, it was about finding a different level of consciousness. Experiencing that we are all one - very unique and deeply respecting of our individuality, but also related. Why hurt others if in some unknown but felt way they are a part of you?
I think their is a high probability there is a reason for life and that reason could be to experience the reason. To find we all belong. Of course quantum mechanics says we create our own worlds. I think that is also probably true which means that collectively we have the choice to build creatively or destructively.