Pyth Network has launched a new service called 'Express Relay' aimed at eliminating Miner Extractable Value (MEV) in decentralized finance (DeFi). MEV is a decentralized monetary system that allows users to maximize personal financial gains through decentralized ledger operations. The 'Express Relay' service introduces priority auctions to remove the extractive role of miners, roll out protocols faster, and provide instant access to a network of top searchers. The Pyth Network's initiative is linked to its token, $PYTH.