One day you and the rest of your close relatives will lose a dear close and important family member like your mother, grandmother or that uncle or aunt that was so loving, entertaining and supportive.
And like so many time after they pass away the generations of your family, especially the young family members, will ask you questions about the personal details of their lives in which you won't have answers for like:
When she was a child, what was the location of grandma's home and what did the house looked like?
When my uncle fought in the war what battles did, he fought in and what happened?
What fun things or activities did grandad and his siblings do together?
WHat were some of the great stories that your grandparents told you about their lives?
Mother, what was the first movie you saw and what did you think of it?