The grocery business is about an $800 billion market in the United States and about $80 billion in Canada. This is one sector of the retail market where Amazon has not achieved a significant beachhead in either country. With the deal to buy Whole Foods, the online retailer will have a small slice of the grocery market (about 1.2% in the United States) in North America, which is dominated by a handful of firms like Walmart (14.2%) and Kroger (7.2%) in the United States and Loblaw Companies, Metro Inc. and Sobeys in Canada.

Last year, the online shopping giant launched Amazon Go, an experimental grocery store with no checkout counter that's currently open to Amazon employees in Seattle. Amazon also opened its first brick-and-mortar book store in Seattle in 2015, and has since expanded to New York City, Chicago, and Los Angeles. The company is said to be evaluating various physical retail experiments that range from futuristic Home-Depot-like stores that incorporate augmented reality to Apple-like electronics boutiques, according to The New York Times. Amazon's acquisition gives the company 431 physical Whole Foods locations to potentially flesh out new concepts.

Amazon’s entry into the grocery market will expose the company to an incredible array of commodities and supply chain variables.