What Role Does Transaction Transparency in the Mempool Play in Enabling Front-Running?

The mempool is a public waiting area for unconfirmed transactions. Its transparency allows malicious "searcher" bots to monitor all pending transactions and identify large, profitable orders before they are executed.

By observing a large buy order, a bot can immediately submit its own buy order with a higher gas fee to jump ahead in the queue. This is the foundational mechanism that enables front-running and MEV exploitation in public blockchain systems like Ethereum.