This is the loss from the swap, comparing the value of the token input vs token output. It includes swap fees (based on pools routes) and price impact (based on current market prices).

This is the maximum slippage that the swap will allow. It is based on the quoted amount out minus your slippage tolerance, using current market prices. You can change your slippage tolerance in your settings.

You will get at least this amount, even if you suffer maximum slippage from unfavorable market price movements before your transaction executes on-chain.