When it comes to revenue, Walmart is the largest company with a net value of $485 billion as per the Fortune Global 500 List. However, in order to remain at the top, it has to keep working out new and innovative ways to secure its position in the retail market. The introduction of Amazon Go has made Amazon enter into the space of physical retailers and is venturing out into the brick-and-mortar space. The e-commerce giants are not taking this too well. Walmart is doing quite well in the e-commerce sales too. Walmart undoubtedly has an edge over Amazon because of its vast network of stores that are physically located. So, Walmart launched a new Walmart Prime service.