A measure of how difficult it is to find a new block compared to the easiest it can ever be.
Difficulty in mining is a measure that indicates how hard it is for miners to find and add a new block to the blockchain. The difficulty adjusts after a certain number of blocks have been added to the blockchain, ensuring that the time for block addition remains constant. This term is most commonly associated with Bitcoin mining.
The difficulty of Bitcoin mining increasing as more miners join the network.