Why is blockchain important because it offers a decentralized, transparent, and immutable way to store and transfer data. It eliminates the need for intermediaries, reducing costs and increasing trust in transactions. With applications in finance, supply chain, healthcare, and voting systems, blockchain ensures security, traceability, and data integrity. It enables innovations like smart contracts, token economies, and decentralized applications (dApps), paving the way for a more secure and efficient digital economy. Blockchain is revolutionizing how individuals and organizations interact and exchange value.