So what is #Blockchain?
Blockchain can be explained in such manner that it can be long and boring. Here, it is short, concise, straight to the point. Just a short introduction.
Simply think of it as a constantly updated lists of transactions. It is supported by (P2P) Peer-to-Peer network that's either private or public. Each member of the community network thus uses the same consensus. Do keep in mind that this is the technology behind $BTC, $ETH and other cryptocurrencies.