In a recent interview withJim Cramer, Walmart Inc (NYSE:WMT) CEO Doug McMillon expressed his confidence in the company’s advertising sector. This comes after the retail giant’s strong performance in the digital and e-commerce space. What Happened: McMillon, in a conversation with Cramer, highlighted the unique advantages that Walmart holds in the advertising domain, reported CNBC. He pointed out that the company’s expanding digital reach, coupled with the growth of its e-commerce business, presents a lucrative opportunity for advertising sales. “When you grow your digital reach, and you’ve got…