Easily the #1 questions I get each day so I figured it would be the best first-blog post. Everyone knows that Walmart is a brick-and-mortar giant with 4,800+ stores in the US but with online shopping continuing to grow, there are now multiple channels to sell at/with Walmart. In-store: physical products sit on physical shelves and are managed by the in-store merchant team 1P: I describe this as Walmart's "virtual shelf" - it is a way for Walmart to extend their "shelf space"