Blockchain technology is a decentralized and distributed ledger system that securely records and verifies transactions across a network of computers. It operates on the principle of consensus, where each participant in the network holds an identical copy of the ledger, ensuring transparency and immutability. Each transaction, or "block," is linked to the previous one, forming a chronological chain. Blockchain's cryptographic nature guarantees tamper-resistant data, making it highly secure. Two main types of blockchains exist: public, accessible to anyone, like Bitcoin's blockchain, and private, restricted to authorized entities for specific purposes, commonly adopted in enterprise settings. The technology holds transformative potential across industries, fostering trust and efficiency.