What happens when Amazon applies its tech know-how to a grocery store? You get Amazon Fresh—a sleek, cashier-free experience.

For a limited time, Amazon is hosting a huge sale with up to 50% off all things pet related. If you're a dog or cat owner, ...

The report found that, in addition to grocery prices, Amazon had the lowest prices on video games, appliances, fashion and sports and outdoors. But it held only a narrow lead in beauty and toys.