Merchants, meet your next big ecommerce opportunity: Walmart.com. Since Walmart began welcoming third party sellers, they’ve shaken up the ecommerce scene. Sellers are excited. Why shouldn’t they be? The site sees 88 million unique visitors per month and is the second-most visited ecommerce site in the United States. Here at GoDataFeed, we’ve seen an increase in merchants who are eager to get their products on the marketplace.