Next to "Miner Incentive Multiplier" add a little "Info Icon" (example here. When the user hovers over the (i), show a tooltip message that says: "The amount we'll multiply the prevailing market gas rate by when bribing the miner to incentivize them to include your transactions directly in the block."
Next to "Miner Incentive Multiplier" add a little "Info Icon" (example here. When the user hovers over the (i), show a tooltip message that says: "The amount we'll multiply the prevailing market gas rate by when bribing the miner to incentivize them to include your transactions directly in the block."