The Oracle of Delphi in ancient Greece served as a priestess who provided prophetic insights to those seeking guidance. Consulting the oracle was a significant aspect of Greek society, where individuals and city-states would present questions about war, politics, and personal matters. The oracle's cryptic answers were believed to be influenced by the god Apollo, making her pronouncements highly revered. This role established Delphi as a central pilgrimage site, highlighting the intersection of religion and decision-making in ancient Greece.