When the term consensus is used in connection with crypto-currency, it means that each transaction within the block chain aims at checking the plausibility in accordance with all previous transactions. Thus the consensus, i.e. the agreement, is proven and the new transaction is classified as correct, carried out and implemented in the block chain. The “Proof of Work” and the “Proof of Stake” are the superordinate procedures for this. You can find a detailed explanation of these terms in our blog post: http://bit.ly/Proof-of-Stake