Cryptocurrency mining difficulty measures the amount of computational power required to mine a block on a Proof-of-Work (PoW) blockchain. The higher the difficulty, the greater the hash power needed to validate transactions. This parameter automatically adjusts based on the network's hash rate to maintain a stable block generation time—for example, Bitcoin's target is to generate a block every 10 minutes. While Bitcoin's high difficulty stems from its popularity and massive network hash rate, not all blockchains use this system; for instance, Ethereum employs a Proof-of-Stake (PoS) mechanism that does not involve mining difficulty levels.