Excellent article about HASHGRAPH on Insider Financial
With Hashgraph, the system used to arrive at consensus is called a gossip protocol. This is a pretty well-known computing term and it basically means that every time a transaction takes place, it’s shared with all of the participants in the network very quickly.
However, before getting on to Hashgraph, it’s probably worth spending some time explaining why something like bitcoin’s blockchain might need improving on.
Basically, it’s incredibly inefficient.