Blockchain technology is basically a digital system for recording information in a way that is hard to change or cheat. Instead of one company or bank controlling the data, the records are shared across many computers, which makes the system more transparent and secure. Most people know blockchain because of cryptocurrencies like Bitcoin, but it can also be used for payments, contracts, tracking products, and storing important records. In simple words, it’s like a shared online ledger that everyone can verify but no single person can secretly control.