What are Bitcoin Blocks?
A Block is similar to a folder on a computer. This folder contains all the transactions in a 10 minute period. Each block is locked at the end of the 10 minutes and stacked on the previous one, so to speak. This creates a chain of blocks also known as the Blockchain. By placing the blocks in a chain or sequence, the cryptographic chain is secure and incorruptible. The Blockchain is a public ledger that keeps a decentralized record of all Bitcoin transactions. Decentralized means that the ledger is stored on many computers worldwide instead of only being kept on one single computer or server.