A Beacon Node is a key component in blockchain networks that use a proof-of-stake consensus mechanism, particularly in Ethereum 2.0. Its primary role is to manage the coordination of validators and maintain the consensus layer of the network.

Beacon Nodes keep track of the validators participating in the network and oversee their activities, such as proposal and attestations of new blocks. They ensure that validators follow the rules of the network, contributing to its security and efficiency.

These nodes also handle the distribution of rewards and penalties to validators based on their performance, helping to encourage honest participation in the network. By doing this, Beacon Nodes help maintain the integrity of the blockchain, enabling decentralized decision-making and governance. In summary, Beacon Nodes serve as the backbone for proof-of-stake systems, ensuring that the network operates smoothly, securely, and fairly.