Question Regarding Olin's commonapp question

“What do you do that is so important to you that you would do it even if no one knew about it? Why is this meaningful to you?”

Can someone please explain what this actually means? Like, I think I have my head wrapped around what it is asking me to write about but I am still a little unsure. Thanks so much!

Just write what you think it means it is subjective there is no right answer.