Fork height refers to the specific block number in a blockchain where a fork occurs. A fork happens when there is a change in the protocol or rules governing the blockchain, leading to divergent versions of the ledger.There are two main types of forks: soft forks and hard forks. A soft fork is backward-compatible, meaning that nodes running the old version of the software can still participate in the network. A hard fork, however, is not backward-compatible and results in a permanent split, creating two separate blockchains.The fork height is crucial because it marks the point at which the two chains diverge. For example, if a hard fork occurs at block 1,000, all transactions and blocks before that will remain the same, but subsequent blocks will differ depending on which version of the protocol is followed. Understanding fork height is essential for users and miners, as it determines which blockchain they are a part of and influences their access to future updates, features, or tokens in the event of a split.