Why is blockchain important because it revolutionizes the way data is stored, verified, and shared. Its decentralized, transparent, and immutable nature enables secure transactions without intermediaries. This technology enhances trust, reduces fraud, and increases efficiency across industries like finance, healthcare, supply chain, and voting. By automating processes through smart contracts and enabling peer-to-peer interaction, blockchain empowers users and organizations alike. It lays the foundation for Web3, decentralized finance (DeFi), and digital identity systems, making it a cornerstone of the next digital transformation era.