What Google Shopping Means for Online Retailers and Amazon

What's Google Shopping?
Unlike Google Product Search, Google Shopping requires merchants to buy product listing ads in order to sell on the site. This has created a major uproar across the industry. Google defends its case by explaining that a paid model will guarantee up-to-date product listings, and thus an improved shopping experience for online consumers, who are expected to spend $327 billion annually in the U.S. alone by 2016.