Why must odyssesus journey to hades the land of the dead?

Odysseus journeys to Hades, the land of the dead, to seek guidance from the prophet Tiresias. After losing many of his men and facing numerous challenges on his voyage home, he needs Tiresias' wisdom to navigate the dangers that lie ahead. Additionally, this journey allows Odysseus to confront his past and gain insights into the consequences of his actions, ultimately shaping his identity and fate.