The network hashrate is the combined computing power of all Scrypt miners on the Litecoin network, measured in GH/s to PH/s. Today mining is done exclusively with specialised Scrypt ASICs. One special feature: the same computing power also secures the Dogecoin network via merged mining - the Litecoin hashrate is therefore effectively the security basis of two networks. As everywhere, for miners: a rising hashrate means declining earnings per unit of computing power; a falling hashrate works the other way round.
Difficulty continuously adjusts to the network hashrate to keep the 2.5-minute block time stable - four times faster than Bitcoin. In the chart above you can switch between hashrate and difficulty and see the relationship across the whole history.
Litecoin halves the block reward at fixed block heights; the next halving is calculated to fall in summer 2027 - the countdown above updates the date continuously. The Dogecoin share from merged mining is not affected by the Litecoin halving, which cushions the impact for Scrypt miners. What this means for a specific device can be calculated in the Litecoin Mining Calculator.
Cryptohall24's dataset goes back to 2011 - Litecoin is one of the oldest active proof-of-work networks in existence. Visible are the GPU era of the early years, the jump caused by the first Scrypt ASICs, and past halvings marked in the chart, with a freely selectable time range and an optional price overlay.