Deal of the day

History :

The deal of the day concept gained popularity with the launching of Woot.com in July 2004, although Woot itself was a modified version of earlier dot-com bubble sites such as uBid. By late 2006, the deal of the day industry had greatly expanded to over 100 deal-a-day sites. In November 2008, Groupon entered the market and became the second fastest online company to reach a billion dollar valuation