What is a miner? [duplicate]

What is a miner? [duplicate]

This question already has an answer here:

I am coming across Bitcoin and Ethereum, I guess I understand what they are and how they work on a very high level, and I am interested in trying things out.

I searched on this platform and I found this answer saying "Now you need to install a miner" (http://ift.tt/2A2YC79).

Good. What is a "miner"? :)

http://ift.tt/2xF53vl

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