How Walmart seeks to evolve in the giant online shadow of Amazon

Walmart, the world’s biggest retailer, is adapting its business to make sure it can compete at the highest level in the online and offline worlds alike.

The masters of the digital universe regularly prove that they don't play favorites when it comes to the institution of annoying online marketing programs.

Just listen to Tony Rogers, CMO of Walmart, the world's largest bricks-and-mortar retailer.

"I didn't...