Bitcoin Cash is a cryptocurrency and a decentralized digital payment system created as a "hard fork" of Bitcoin on August 1, 2017. This means that Bitcoin Cash is a branch of the original Bitcoin blockchain, with certain changes to the protocol. The most significant change is an increase in block size, which allows for more transactions to be processed per second compared to Bitcoin. Bitcoin Cash uses Proof of Work (PoW) as its consensus mechanism, which means that the network relies on computers solving complex mathematical problems to validate transactions and secure the blockchain. The goal of Bitcoin Cash is to offer a faster and more scalable solution for daily transactions, while maintaining many of the fundamental principles that made Bitcoin popular, such as decentralization and security.