Advertisers collect information with every digital move people make. They then target ads based on that information. Communications scholar Joseph Turow worries that advertisers will use such data to discriminate against people and put them into "reputation silos."
Pinterest, which has drawn lots of media interest and millions of users, has been tagged "digital crack for women." But while most users are female, men are finding ways to use the social media site, like Drew Hawkins' "Board of Man."
Diplomacy in the age of social media is transforming the way ambassadors do their jobs. From tweets to Facebook posts, the State Department is encouraging ambassadors to get their messages out in new and different ways.