What Are ‘MEV-Boost’ and ‘Proposer-Builder Separation (PBS)’?
MEV-Boost is a software used by Ethereum validators to outsource the block-building process to specialized 'builders' who compete to create the most profitable block (including MEV). Proposer-Builder Separation (PBS) is the long-term protocol goal to formally separate the roles of block proposer (validator) and block builder to democratize MEV and reduce centralization risk.