The filters in question are the following: - Meal plans: Displays only the rates of the selected meal plan. The options are the typical “free breakfast”, “half board”, “full board” and “all-inclusive”. - Free cancellation: Hides all non-refundable rates or any which are outside the cancellation period. - Pay at the hotel: Hides all ‘pay now’ rates (usually non-refundable). - Express Booking: Only shows channels with the trivago Express Booking feature enabled. Get the full story at Mirai