The phrase refers to a specific type of salsa, characterized by its primary ingredients: black beans and corn. This salsa variety is commercially available at Walmart, a large retail corporation operating a chain of hypermarkets, discount department stores, and grocery stores. Therefore, the term specifies both the product composition and its point of sale.
The popularity of this salsa likely stems from its combination of affordability, accessibility, and appealing flavor profile. It offers a convenient way for consumers to incorporate vegetables and plant-based protein into their diets. Furthermore, the availability at a major retailer like Walmart ensures widespread access, contributing to its potential market reach and consumer recognition.