Explain How “Priority Fees” (Tips) Are Used in Modern Blockchain Fee Markets

Priority fees are an optional payment users include with their transaction to incentivize the block builder (miner/validator) to include their transaction quickly. Unlike the base fee, the priority fee goes directly to the block builder.

In the context of front-running, an attacker uses a high priority fee to ensure their manipulative transaction is ordered before the victim's, essentially bribing the block builder for execution priority.