What is Proof of Contribution (PoC/PoCo)?

Proof of Contribution (PoC) is a consensus mechanism that is based on user contributions to the network. This process works by using specialized algorithms that monitor contributions of all the network's nodes during each consensus round. The node that has the highest contribution value in each round is given the right to generate the next block. Proof of Contribution is considered to be a quite decentralized consensus model. Proponents maintain that it is extremely resistant to hard forks and can enhance the security and transparency of networks that implement it.