We generally experience seasonal fluctuations in the demand for our travel products and services. For example, traditional leisure travel bookings are generally the highest in the first three quarters as travelers plan and book their spring, summer and holiday travel. The number of bookings typically decreases in the fourth quarter. Because revenue for most of our travel products, including merchant and agency hotel, is recognized when the travel takes place rather than when it is booked, revenue typically lags bookings by several weeks or longer. The seasonal revenue impact is exacerbated with respect to income by the nature of our variable cost of revenue and direct sales and marketing costs, which we typically realize in closer alignment to booking volumes, and the more stable nature of our fixed costs. Furthermore, operating profits for our primary advertising business, trivago, are experienced in the second half of the year as selling and marketing costs offset revenue in the first
half of the year as we aggressively market during the busy booking period for summer travel. As a result, revenue and income are typically the lowest in the first quarter and highest in the third quarter. The continued growth of our international operations or a change in our product mix may influence the typical trend of the seasonality in the future.