https://www.cnbc.com/2018/11/05/travel-giant-booking-spent-1-billion-on-google-ads-in-the-quarter.html

Online travel giant Booking Holdings spent upwards of $1 billion on Google ads in the past quarter, according to its earnings report and analyst estimates.

Booking, which owns Europe's Booking.com and U.S. businesses including Priceline and Kayak, said on Monday that it shelled out $1.3 billion on "performance marketing" in the quarter, up from $1.2 billion a year earlier. That spending was "primarily related to the use of online search engines (primarily Google)," and other online services, according to Booking.