Let's popularize the terms commonly used in block chain explorer queries.
Block hash
Block hash is a number obtained by performing a secondary hash calculation on the block header. It is one of the identifiers of a block, which can uniquely identify a block.
Block height
Block height refers to the number of Bitcoin blocks excavated since the creation of the block, which is one of the identifiers of the block, but cannot recognize a single block. Two or more blocks may have the same block height and occupy the same position on the blockchain.
Transaction fee
The transaction fee, also known as the transfer fee, is related to the number of bytes occupied by the transaction and is not related to the size of the transfer amount.
Mining difficulty
Measuring the average number of operations required to mine a block reflects how long it takes to mine a certain number of blocks at a certain level of difficulty.
