Facebook Exchange (FBX) and Twitter’s tailored audiences product may be the hottest recent developments in digital advertising. FBX, launched in 2012, is an exchange where marketers buy space in real time on Facebook to retarget likely customers. Twitter’s enhancement of its promoted tweets and promoted accounts programs, which came out of beta last December, is another option to reach in-market travelers in real time. It’s hard to escape the significance of both platforms. With one billion active users, Facebook controls fully 25% of the internet’s display ad inventory. And with the mass migration of users to the mobile environment, Twitter (which derives 65% of its ad revenue from mobile) represents a likely way to reach them. And travel brands are among those that should take notice. Get the full story at Tnooz