CBDC stands for Central Bank Digital Currency. It is a digital form of fiat currency that is issued and backed by a central bank, and is designed to function as a legal tender in the same way as traditional banknotes and coins.

Unlike cryptocurrencies such as Bitcoin or Ethereum, which are decentralized and operate independently of central authorities, CBDCs are centralized and operate under the control and oversight of a central bank.

CBDCs can take various forms, including account-based and token-based systems. In an account-based system, a user's CBDC balance is stored in an account maintained by the central bank, much like a traditional bank account. In a token-based system, CBDCs are issued as digital tokens that can be transferred between users without the need for an intermediary.

The main benefits of CBDCs include greater efficiency in payments and transactions, increased financial inclusion, and improved monetary policy effectiveness. CBDCs can also potentially reduce the risks associated with cash transactions, such as money laundering and terrorism financing.

Several countries and central banks are currently exploring the development and implementation of CBDCs, including China, Sweden, the European Union, and the United States.