Amazon is rolling out some of the biggest Black Friday deals as sales season heats up. The retail giant has announced its official Black Friday sale will begin on November 21 and run through December 2. From Dyson and Levi's to Hot Wheels and Ninja, you can expect tons of massive markdowns on your favorite name brands.

The retailer already has loads of discounts on high-tech gadgets, audio gear, and TVs, just in time for the holidays

Walmart announced Monday its plans for its second Black Friday sales event and for its Cyber Monday sales event. Here's what to know.