Apple's flagship device has captured a modest 16% of the global market, and Android dominates globally. Why do so many Americans keep buying iPhones?
Google tracks pretty much everything you do, including where you've been, what you look like, and your personal beliefs. See what Google knows about you.
Though Facebook has been in the spotlight, it's only one part of a complex, multi-billion dollar industry that makes a living from your personal data.
Services like Google and Facebook may seem free, but they actually come at a cost: your personal data. Find out what it's worth to marketers and...