What message does Huckleberry Finn teach us?

Could you elaborate on the key message conveyed by the classic novel Huckleberry Finn? As a work of literature, does it offer any insights into societal norms, personal growth, or moral dilemmas that are still relevant today? Additionally, how does the character of Huck Finn himself serve as a reflection of the struggles and triumphs of young people navigating through life's challenges?