What is Participation Node (Algorand)?

Participation Nodes are the most powerful nodes that make up the Algorand blockchain network and are responsible for running Algorand's Pure Proof of Stake (PPoS) consensus mechanism. Any network participant can participate in the proposing and voting procedure by staking ALGO and generating a valid participation key in order to become a Participation Node. Algorand's PPoS consensus mechanism utilizes a two-phase block production process consisting of proposing and voting. Participation Nodes are coordinated by another type of Algorand network node — Relay Nodes — which facilitate communication among participation nodes and do not directly participate in proposing and voting.