Apple's location-tracking iBeacon allows apps to directly target users with advertisements and deals when a customer is in range of specific items. So how exactly does it work, and where can you use it? WSJ's Niki Blasina explains.
These Naughty Cats Are Up to No Good
Michael Phelps Quietly Tied the Knot in June
Martha Stewart's Hilarious Confession on 'Ellen'
Best Halloween Costumes From 'Today Show'