If you’re a smartphone owner—and chances are that’s everyone reading this—you’ve probably encountered an eerie, but all too common scenario: One day you’re talking about a random topic while your phone is next to you and the following day you notice ads start popping up related to that same topic. It’s unsettling. How do these ads know what you were talking about? Your smartphone may be the culprit. Every smartphone has its built in microphone...
