Bitcoin Mining Difficulty Explained: Why It Changes

Bitcoin mining difficulty is a number that shows how hard it is to find a valid block. Thousands of machines chase every block, yet a new one still shows up roughly every ten minutes. Difficulty is the dial that keeps that pace. Without it, faster hardware would flood the chain within weeks. So the protocol tightens the rules when miners get stronger and loosens them when miners leave. Newcomers can start with how Bitcoin mining works and then return to this topic. Mining is basically guessing. A miner feeds block data into a hash function, which turns any input into a fixed-length code. The block counts only if that code lands below a target number set by the network. A smaller target means fewer lucky guesses.

First reported by CoinGabbar. This page is a short excerpt; the full text is theirs.