Understanding the term
A block height can also be expressed as b minus 1, where b is the total length of the blockchain. It can either refer to the length or size of a blockchain at present or at a point in time. For instance, Bitcoin halving occurs every 210,000 blocks. There may be more than one block with the same block height in a blockchain, competing for the same position.
A cryptocurrency’s block height indicates how often new blocks are discovered and added to its chain. Therefore, block explorers often display block height as key pieces of information that help users who are looking for specific transactions or blocks.