Cryptocurrency transactions involve the transfer of digital currencies, such as Bitcoin or Ethereum, between users. These transactions are recorded on a decentralized ledger called a blockchain, which ensures transparency and security. Each transaction is verified by a network of computers, known as nodes, that confirm the legitimacy of the transfer. To initiate a transaction, a user typically needs a digital wallet, which stores their cryptocurrency and allows them to send or receive funds. Once a transaction is completed, it cannot be altered, making it a secure method for transferring value without the need for traditional banks or intermediaries.