Summary: <p>Online advertising was once limited to banner and pop-up ads that most Internet users would eagerly minimize. Today's ads, which use social platforms like Vine and Instagram to engage their audience, are more sophisticated. They are also growing more personal, as marketers mine social data to tailor ads to the tastes and interests of individual users. We explore new developments in online advertising and ask what they mean for users and their privacy on the web.</p>
