Woot buys something in bulk (electronics, tools, home goods, you name it) and sells only that for one day at a good price. Then the next day, they sell something new.

Typically, you will find electronics on Woot but you never know what they will be selling next. Unsold goods are saved for Woot offs. During a Woot off, Woot lists goods at an even greater discount until the product is sold out. After the product is sold out, they will list the next item that they want to sell out. Every now and then, Woot off will sell “bag[s] of crap”. These are just assortments of items that Woot has not sold out. These “bag[s] of crap” have been known to randomly contain high value electrics such as big screen TVs.

Woot official Chrome extension: https://chrome.google.com/webstore/detail/woot/klhoeofncdoaefllgaacgnecchcphphb?hl=en