Definition ∞ Ordering Protocols are a set of rules and procedures that determine the sequence in which transactions are processed and included in a blockchain block. These protocols are crucial for preventing front-running, ensuring fair access to network resources, and maintaining the integrity of decentralized exchanges. They dictate how transactions are selected, grouped, and ultimately recorded on the distributed ledger. Proper ordering is vital for fair market operation.
Context ∞ The design and implementation of ordering protocols are a subject of continuous research and debate within the blockchain community, particularly concerning miner extractable value (MEV) and transaction censorship. News often highlights innovations in this area aimed at improving transaction fairness and mitigating adverse effects from sophisticated ordering strategies. The evolution of these protocols directly impacts the user experience and economic fairness of decentralized applications.