How Stores Track Their Shoppers

'Til You Drop Robinsons Place Manila, Philippines Ninjakeg, CC BY-SA 3.0 You've seen it happen. One day, you're aspirationally browsing performance outerwear online; the next day, you're seeing ads for Primaloft and Gore-Tex on every website you visit. That's the power of tracking people while they're shopping--even if they don't buy anything--and brick-and-mortar stores want to get in on that action, too. They just need a way to record where their customers go, the way websites do. MIT Technolo...