The term is used to identify a realnet/mainet blockchainA blockchain—the technology underlying bitcoin and other c... More from a testnet network, which only exists for experimenting, testing and educational purposes. In the BitcoinBitcoin is a digital currency (also called crypto-currency) ... More network, both the mainet and testnet are identical, however, the two networks are not compatible with each other. The testnet Bitcoin have no real value, while you cannot sent BTC from a testnet to a mainet address (and vice-versa)