Blockchain
Blockchain is a decentralized, distributed ledger technology that records transactions across multiple computers in a way that ensures security, transparency, and immutability. It operates as a chain of blocks, where each block contains a list of transactions, a timestamp, and a cryptographic hash of the previous block, creating a tamper-resistant record. This technology underpins cryptocurrencies like Bitcoin and enables applications in finance, supply chain, and digital identity.
Developers should learn blockchain to build decentralized applications (dApps), smart contracts, and secure systems that require trustless transactions and data integrity. It's essential for roles in fintech, supply chain management, and emerging Web3 projects, where transparency and security are critical. Use cases include cryptocurrency platforms, voting systems, and asset tracking.