In 2021, the US grocery industry had been undergoing several changes. The competitive landscape had changed significantly since the first decade of the twenty-first century. Walmart Inc. (Walmart) had emerged as the dominant retailer in all markets leading to bankruptcies and mergers with erstwhile market leaders. However, mistakes made by Walmart in that same period allowed ALDI SÜD Dienstleistungs-SE & Co. (Aldi) to make its presence felt with Walmart’s customers. Aldi was gaining its advantage through rapid expansion, with an increasingly broader assortment of products meant to attract upscale customers. Walmart initially tried to respond by opening small-format stores. Walmart had to decide whether this was the right approach to use to fight Aldi, or whether it was even a worthwhile fight. On the other hand, Aldi needed to be careful with how fast and far it should deviate from the core business model that had been instrumental in its success. Finally, the grocery business model had a growing online component that became more prominent during the COVID-19 pandemic. Therefore, Aldi and Walmart also had essential decisions to incorporate these online aspects into their respective business models.

In 2021, the US grocery industry had been undergoing several changes. The competitive landscape had changed significantly since the first decade of the twenty-first century. Walmart Inc. (Walmart) had emerged as the dominant retailer in all markets leading to bankruptcies and mergers with erstwhile market leaders. However, mistakes made by Walmart in that same period allowed ALDI SÃœD Dienstleistungs-SE & Co. (Aldi) to make its presence felt with Walmart's customers. Aldi was gaining its advantage through rapid expansion, with an increasingly broader assortment of products meant to attract upscale customers. Walmart initially tried to respond by opening small-format stores. Walmart had to decide whether this was the right approach to use to fight Aldi, or whether it was even a worthwhile fight. On the other hand, Aldi needed to be careful with how fast and far it should deviate from the core business model that had been instrumental in its success. Finally, the grocery business model had a growing online component that became more prominent during the COVID-19 pandemic. Therefore, Aldi and Walmart also had essential decisions to incorporate these online aspects into their respective business models.