MEV stands for Maximum Extractable Value. MEV in the context of Ethereum refers to validators that insert, reorder, or pick and choose transactions that go into a block in order to extract the maximum value they can for validating that block.
Can MEV or MEV-Boost encourage censorship?
Validators that choose to use a block-relay system that employs an MEV strategy run the risk of having some transactions censored or blacklisted if the MEV strategy chooses to do so.