The revenue has traditionally been low compared to powerful search engines like Google and Yahoo and other commerce sites since people traditionally use social networking sites like Facebook for communication rather than seeking information on products and services.
Google is one of the leading internet search engines with substantial resources and expertise in developing online commerce and facilitating internet traffic.
However, with the entry of large internet search engines such as Google (which has substantial resources and expertise in developing online commerce and facilitating internet traffic) in the online travel market, the future growth of Kayak and other related companies faces great risks ahead.