Mining is how proof-of-work blockchains like Bitcoin stay secure without anyone in charge. Machines around the world race to find a number that, hashed with the block's data, lands below a target. The first to find it adds the next block and collects the block reward plus fees. There is no shortcut. It is trillions of guesses per second and the only way to win more often is to guess faster than everyone else.
The Difficulty and Hashrate tiles at the top of this page read live from Blockchair. Hashrate is the total guessing power on the network. Difficulty is the network's automatic response to it: every 2016 blocks Bitcoin retargets so blocks keep arriving about every ten minutes no matter how much hardware joins or leaves. That is the most misunderstood part of mining. Adding your machine does not speed the network up. It raises difficulty for everyone and shrinks each miner's slice of a fixed reward. Difficulty climbing is a sign other people brought more machines online, not that anything is broken.
The profitability table answers the question everyone actually arrives with: is it worth it right now. Each row pairs a coin with its Algorithm, the network hashrate and an estimated revenue per day at a reference hash speed. Revenue is not profit. Subtract your power cost and on Bitcoin's SHA-256 that gap is brutal unless your electricity is cheap and your hardware is current. The Miner Software Tracker follows the clients that run the rigs, the Mining Toolkit collects the calculators worth keeping and the Mining News feed carries difficulty swings and hardware releases as they land.
Who is this page for. If you run rigs, this is a morning dashboard: difficulty trend, what is paying and whether a new miner build dropped. If you are deciding whether to start, the profitability table plus your own power rate is the honest answer before you spend a cent on hardware.
Read the PEARL spotlight for where this is heading. Proof of useful work points hash power at verifiable GPU compute instead of pure puzzle solving so the energy does a second job. It is early and liquidity is thin, but it is the most interesting shift in mining economics since ASICs arrived. The GPUs that mine it are the same ones the AI sector and DePIN compete for.