Blockchain is a key technology behind Web3. It is most-often associated with the cryptocurrency bitcoin and is the technology that underpins it. The bitcoin blockchain is a public ledger of activity of the bitcoin network. But bitcoin is not owned by a single company or person and it is not issued by a central authority like a central bank. Instead, it is decentralized and the network is maintained by a global group of people running specialized computers. So blockchain is a key technology an...