How Do New Blocks Are Added to a Blockchain, Explained

Blockchain is different from conventional databases in that the former collects and stores data in sets called blocks. Blocks have a specific data storage capacity. When they are filled, the block is closed and the next block is started and linked to the previous block. Blocks form a chain in this way and the whole network is called a blockchain.

Note that databases use tables to store data but blockchains are simply chains of blocks connected to each other and growing all the time. Such structure makes blockchains irreversible, ruling out the possibility of someone going back and editing the blocks of the past. Once a block is filled, it is permanent and each one has a timestamp that further cements its position on the chain.