It's very likely this story was based on someone Jesus knew personally, in which case we will meet the real life prodigal sone when we get to heaven. This story is often used as an analogy for our relationship with God. We may wander away from Him, but He is always ready to take us back if we turn to Him in repentance. And, just as the prodigal son was welcomed home by his father, we will be welcomed into heaven by our Heavenly Father when we die.