What is ....?

Question

what is block chain .. why it's so important?

Answer 1

Well, I can't think of a blockchain that doesn't run on cryptocurrency. Blocks of transactions take a lot of computing power to verify, so being able to "earn" cryptocurrency from contributing the required computing power is part of the incentive structure.

Answer 2

There are many responses available via the search bar.

Blockchain is a distributed ledger.

It's actually not very important (yet), in my opinion. Even Ethereum is still in beta.

Answer 3

is it just for crypto currency or has another importance ?