Blockchain is a relative new database technology which brings big improvement and security.
In a simple way explained: Blockchain is a distributed database existing on multiple computers at the same time. It is constantly growing as new sets of recordings, or 'blocks', are added to it. Each block contains a timestamp and a link to the previous block, so they actually form a chain. >The database is not managed by any particular body; instead, everyone in the network gets a copy of the whole database. Old blocks are preserved forever and new blocks are added to the ledger irreversibly, making it impossible to manipulate by faking documents, transactions and other information.
Read more at https://ihodl.com/tutorials/2017-09-04/what-blockchain-laymans-terms/
