Bitcoin is a digital currency that operates on a decentralized network called blockchain. It was created in 2009 by an unknown person or group of people using the pseudonym Satoshi Nakamoto. Bitcoin transactions are recorded on the blockchain, which is a public ledger, and they are verified by network nodes through cryptography. Bitcoin can be used for various purposes, including online purchases, investment, and remittances. Its value is determined by supply and demand in the market, and it has experienced significant price volatility since its inception.