The role of the oracle in Greek mythology is to provide prophecies and divine guidance to heroes and mortals. Oracles, such as the famous Oracle of Delphi, serve as intermediaries between the gods and humanity. They deliver cryptic messages that shape the destinies of individuals and cities, often requiring interpretation. The ability to consult an oracle symbolizes the human desire to understand and influence fate, reflecting belief in the gods' omnipotence and the search for wisdom in uncertain times.