The television advertisement that hit the airwaves in Florida last month featured the Republican Party's rising star, Sen. Marco Rubio, boasting about his get-tough plan for border security.
In shaping its targetted advertising strategy, Facebook is no longer relying solely on what Facebook users reveal about themselves. Instead, it is tapping into outside sources of data to learn even more about them.
Intel made its fortune on the chips that power personal computers, and Microsoft on the software that goes inside. Google’s secret sauce is that it finds what you are looking for on the Internet. But the ground is shifting beneath these tech titans because of a major force: the rise of mobile devices.