Mining is the term used in crypto vocabulary that refers to using the processing power of a computer's hardware to verify digital transactions on a blockchain network. Mining can be done by individuals, mining pools (where several individuals aggregate their computing power to verify transactions), or mining farms made up of numerous processors. 

A miner is a transaction validator that is rewarded for giving computing power in order to ensure the accuracy of the blockchain and that no false transactions have taken place. 

If you'd like to learn more, check out this link: https://www.youtube.com/watch?v=kZXXDp0_R-w

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