A fundamental feature of a blockchain network is its decentralization, which enables the direct sharing of data among participants without a central authority. This decentralized structure enhances security and trust, as transactions are verified by multiple nodes through a consensus mechanism. Additionally, the immutability of data within a blockchain ensures that once a transaction is recorded, it cannot be altered or deleted. These characteristics make blockchain uniquely suitable for applications in finance, supply chain management, and various other domains requiring transparency and reliability.