|TRIVAGO N.V. filed this Form 20-F on 03/06/2018|
Our Referral Revenue from the Americas, Developed Europe and the Rest of World were 38.0%, 46.3% and 14.7% of our total revenue, respectively, for the year ended December 31, 2016 and were 37.8%, 41.0% and 19.7% of our total revenue, respectively, for the year ended December 31, 2017. We believe the relative growth in Referral Revenue across our reportable segments is primarily related to the different stages of development of our markets. We generate the most Referral Revenue in Developed Europe, our segment that includes the markets where we have operated the longest and where we have the highest level of brand awareness but relatively moderate growth. We typically expect to have higher growth rates in newer markets, and as a result, expect our Referral Revenue in the Americas and the Rest of World to increase at a faster rate than Referral Revenue in Developed Europe. We continue to improve the localization of our websites and apps for each market in an effort to augment the user experience and to grow our user base globally. We invest heavily in marketing campaigns across our markets.
Travelers increasingly access the Internet from multiple devices, including desktop computers, smartphones and tablets. We continue to develop our websites and apps to further enhance our hotel search experience across all devices. We offer responsive mobile websites and several apps that allow travelers to use our services from smartphones and tablets running on Android and iOS. In the year ended December 31, 2017, our revenue share from mobile websites and apps exceeded 60%.
Visitors to our hotel search platform via mobile phone and tablet generally result in bookings for our advertisers at a lower rate than visitors to our platform via desktop. We believe this is due to a general difference in the usage patterns of mobile phones and tablets. We believe many visitors use mobile phones and tablets as part of their hotel search process, but prefer finalizing hotel selections and completing their bookings on desktop websites. This may be due in part to users generally finding the booking completion processes, including entering payment information, somewhat easier or more secure on a desktop than on a mobile device. We believe that over time and as more travelers become accustomed to mobile transactions, this sentiment may shift.
We have historically had, and currently have, a single bidding price structure for referrals from both desktop and mobile. We may choose to adopt a differentiated pricing model between mobile and desktop applications, which would likely lead to an increase in desktop revenue share, as the pricing for desktop applications would increase due to higher conversion rates, while the pricing for apps on mobile and tablets would likely decrease. We do not expect this to have a material impact on revenue, as long as there are sufficient active participants on both desktop and mobile to ensure our marketplace functions effectively, as we believe that the current bids advertisers place on our CPC-based bidding system reflect the overall efficacy of the combined desktop and mobile prices they receive.
We believe mobile websites and apps will continue to gain popularity, and we expect to continue to commit resources to improve the features, functionality and conversion rates of our mobile websites and apps.
Advertiser diversification and direct relationships with hotels
We generate most of our revenue from a limited number of OTAs. Certain brands affiliated as of the date hereof with our majority shareholder, Expedia, including Brand Expedia, Hotels.com, Orbitz, Travelocity, Hotwire, Wotif and ebookers, in the aggregate, accounted for 39%, 36% and 36% of our total revenue for the years ended December 31, 2015, 2016 and 2017, respectively. Booking Holdings and its affiliated brands, Booking.com and Agoda, accounted for 27%, 43% and 44% of our total revenue for the years ended December 31, 2015, 2016 and 2017, respectively. We believe that our business success in the long term will be enhanced by diversification among our advertisers, in particular by means of expanding our direct relationships with independent hotels, hotel chains and providers of alternative accommodation and continuing to act as a platform that enables travelers to compare hotel rooms that are offered by smaller and local OTAs or independent hotels or by the leading international brands.