Past 3 years have been great for the retail sector. Color has returned to the global economy and with it consumer confidence has also returned. By 2020, this sector is expected to have grown to the size of $28 trillion. Walmart is the king of physical retail. However, competitive pressure on it has kept increasing with time. Apart from the other US and non-US retail brands, e-retail also poses a significant challenge before the largest retailer. Coupled with the thousands of stores in US, Walmart has also expanded its presence internationally.