The essence of blockchain's decentralization lies in its ability to distribute data across a network of nodes, eliminating the need for a central authority. Each participant on the blockchain maintains a copy of the entire ledger, which enhances transparency and security. This decentralized structure prevents tampering and fraud, as altering any single block would require changing every subsequent block on the network. Decentralization also promotes trust among users, as transactions are verified collectively by the network rather than by a single entity, fostering greater accountability and resilience against failures.