Liveness refers to the guarantee for a system uptime, where it would continue to provide data without the intervention of a centralized governing body. With the advent of blockchain, rose the creation of consensus algorithms.

Liveness contributes to a protocol being able to share data across all nodes, while every node comes to a consensus. It is through the liveness of a blockchain network that the investors are guaranteed that something good will happen in the coming future.

The Proof-of-Work (PoW) and Proof-of-Stake (PoS) are two of the most commonly used consensus mechanisms. With liveness, we can track the history and expected history of a blockchain network with ease.