The Friday after Thanksgiving is traditionally known as Black Friday. It unofficially kicks off the Christmas shopping season. It's the day where most retailers finally make it into the "black" and start turning a profit for the year. Retailers open their doors extremely early and offer crazy deals to lure people into their store so there will be plenty of bargains to get today!
If you're brave enough to venture out there today (and I'm certainly not) please stay safe and try to have fun!