The primary purpose of Odysseus's journey in Homer's "The Odyssey" is to return home to Ithaca after the Trojan War. This epic journey highlights themes of perseverance, wisdom, and identity, as he encounters numerous trials and tribulations, including mythical creatures and divine interventions. Through his adventures, Odysseus grows as a character, learning valuable lessons about leadership and the importance of home and family. Ultimately, his journey symbolizes the struggle for self-discovery and the quest for belonging.