What is Block Height?

Block height is a measurement of the number of blocks that came before a particular block in a blockchain network. Every block possesses a unique block height value — essentially a number that marks its chronological order in the blockchain. The genesis block (the very first block ever created on a blockchain network) has a block height of zero, meaning that no blocks were created before it. Block height is a critical measurement of the rate that new blocks are added to a blockchain and also acts as an identifier for each individual block in the network.