What is MEV? Front-running, Sandwich Attacks, and Slippage Explained

Summary

MEV (Maximal Extractable Value) is profit extracted by validators and bots by reordering transactions in a block. This video explains front-running, sandwich attacks, and arbitrage — and why they affect ordinary DeFi users through worse execution prices.

Key Concepts

Things To Remember

• MEV refers to profit that validators/miners can extract by controlling transaction ordering.
• Front-running means placing a transaction ahead of a known pending one to profit from its price impact.
• Sandwich attacks place orders before and after a victim's trade.
• Using DEX aggregators and MEV protection tools can reduce sandwich attack risk.

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