Quick answer
Difficulty adjustment changes the mining target so Bitcoin’s average block interval stays near its protocol goal.
What is Difficulty adjustment?
Bitcoin periodically adjusts mining difficulty in response to how quickly recent blocks were produced. More total computing power can raise difficulty, while less power can lower it, although individual blocks still arrive unevenly.
The useful way to approach this term is to separate its definition from the assumptions people often attach to it. In crypto, the same word can appear in a protocol rule, a user interface, a market-data label, or a marketing claim. Check which layer the explanation is describing.
Why does difficulty adjustment matter?
Difficulty helps explain why a sudden change in hashrate does not permanently make blocks arrive faster. It is also a key input for mining-cost discussions and network-security analysis.
Concrete example
See it in a real situation
If recent blocks were found faster than the target interval, the next adjustment makes valid hashes harder to find. Miners then need more expected computation to produce a block.
Common misconceptions
What this term does not mean
- Difficulty is not a measure of how complicated a transaction is.
- Difficulty does not make every block take exactly the same amount of time; it changes the probability distribution.
Related terms
Sources and further reading
Definitions are written for education and checked against the sources below where relevant. A source can explain a protocol or rule without endorsing every product built around it.