Blockchain is primarily known for its role in facilitating secure, decentralized transactions across various platforms. Originally developed as the underlying technology for cryptocurrencies like Bitcoin, blockchain provides a distributed ledger that records transactions in an immutable and transparent way. Each transaction is grouped into a block, which is then chained to the previous block, ensuring the integrity of the data. Blockchain’s applications extend beyond currencies to include supply chain management, digital contracts, and many other use cases that require secure and verifiable data.