The Blockchain is a distributed ledger system where each information is stored in the public database. A Blockchain is the constitution of a series of individual unique blocks. These blocks within the Blockchain contain every single detail about the transactions that were conducted so far. They are equipped with unique identifiers that allow them to differentiate each block from one another.
Each block in the Blockchain is created by solving cryptographic problems, often termed mining. These records are stored in the computers of every single user that is linked to the Blockchain, resulting in a decentralized record. Blockchains are considered to be virtually unfalsifiable which makes them almost impossible to breach.