What is the role of miners in blockchain?

Question

Would anyone kindly elucidate the role of miners within the blockchain network?

Answer 1

In a blockchain network, users termed as miners verify the validity of the transactions and append newly created blocks to the existing chain of blocks. This is achieved by passing through intricate mathematical algorithms which involve stages of proof of work. The miner who first breaks the block gets the right to append this block to the chain and earns a specific amount of cryptocurrency like bitcoins as a reward.

Comments

The answer for the last quiz you gave is option D - Hash encryption . Because whatever input item we have in whatever length , it will be as the same output item in a fixed length . So there is possibities of alteration .

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miners part i didnt understand pls explain how does miner validate the criptografy. and why this is specially need in cryto currect crypto does all cryptografy need so much processing power? bit coin transaction will be slow to?

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Best explanation content so far. I just wished that there will be an in-depth discussion on the mining part. But all in all, this is great. Will definitely recommend this one to my friends.
Thanks

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Question, so what happens in the time it takes for someone to validate your transaction, ie, the miner? Are we talking few seconds or hours?

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So what happens when the last bitcoin is issued to a miner for "proof of work". How will they get paid after that? Will they have to keep mining for free?