Swap protection protects your Ethereum Mainnet transactions from sandwich attacks and front-running.
When swapping with swap protection in the Uniswap Wallet, your swap is sent to a private transaction pool to protect your swaps from front-running and sandwich attacks.
Swap protection is automatically turned on for all Ethereum transactions. You can turn Swap protection on or off in Swap settings. You always still have the option to adjust slippage manually.
Swap protection in the Uniswap Wallet uses MEV Blocker.