(credit: Marketplace)

Labels: not just for food anymore. Companies have to organize their customers somehow – otherwise they’d be marketing denture cream to 8-year-olds and tampons to middle-aged men. Are you a High Rise Renter? Part of Main Street USA? Live in a college dorm? There’s a label for that.

How do they do it? Well they used to just make their best guess about who was watching a given channel at a given hour (guess who was watching Oprah at 4pm every day?) and tailor their advertising appropriately. But now marketers have all sorts of information about us. From online profiles to credit card transactions to Google searches and Foursquare check-ins, everyone with some kind of connection to the outside world is pretty much leaving a trail of data every where they go.

So – surprise! – a huge industry has sprung up to collect and analyze this data (called “data mining”) and sell it to the companies that want to sell you stuff. You can read all about it here, and “identify your lifestyle category” here.