Proposer-Builder Separation

Proposer-Builder Separation is a protocol design that separates the responsibilities of proposing a block and building the block's content. This architecture aims to reduce the incentive for validators to engage in complex MEV strategies, thereby promoting network decentralization.

By allowing validators to outsource the construction of blocks to professional builders, the protocol ensures that all validators have access to the same MEV revenue opportunities. This separation mitigates the risk of large, resource-rich validators dominating the network due to their superior MEV extraction capabilities.

It is a fundamental concept in the roadmap for many proof-of-stake blockchains, aiming to create a more equitable and efficient consensus mechanism. Proposer-Builder Separation is essential for long-term network stability and fairness.