The Integration with External Data Sources feature enables decentralized prediction markets to connect with various third-party APIs, allowing for the retrieval of real-time data related to specific events. This integration ensures that the outcomes of prediction markets are resolved accurately based on verified real-world events, enhancing the reliability and trustworthiness of the market. By leveraging external data sources, users can participate in prediction markets with confidence that the outcomes are based on factual information, thereby increasing user engagement and market activity.