What is blockchain?
Blockchain is a digital ledger in which transactions made in Bitcoin or another cryptocurrency are recorded chronologically and publicly. It allows digital information to be distributed but not copied.
Many have compared the blockchain with a spreadsheet: the spreadsheet is duplicated thousands of times across a network of computers and this network is designed to regularly update this spreadsheet. The blockchain is transparent and cannot be corrupted, it isn’t controlled by any single entity and it is not flawed.