Why is blockchain important because it provides a secure, transparent, and decentralized method for recording digital transactions. It eliminates the need for intermediaries, reduces fraud, and enhances trust across various industries like finance, healthcare, supply chain, and real estate. Blockchain ensures data immutability and enables real-time verification, making systems more efficient and auditable. From powering cryptocurrencies to enabling smart contracts and decentralized apps, blockchain is transforming digital infrastructure by offering greater transparency, user autonomy, and tamper-resistant records for a more secure digital future.