Hash rate measures the total computational power being used to mine and process transactions on a proof-of-work blockchain. It is typically measured in hashes per second (H/s).
Hash rate units include KH/s (Kilohash - thousands), MH/s (Megahash - millions), GH/s (Gigahash - billions), TH/s (Terahash - trillions), and EH/s (Exahash - quintillions).
Hash rate importance: Higher hash rate means greater network security, more computational power needed for attacks, indication of miner confidence, and correlation with mining profitability.
Factors affecting hash rate include Bitcoin price and mining profitability, electricity costs, mining hardware efficiency, regulatory environment, and seasonal variations.