The document discusses the growing threat that European hard discount retailers Aldi and Lidl pose to other retailers across Europe and potentially worldwide. It outlines how Aldi and Lidl have been rapidly expanding across Europe through new store openings and geographic expansion. Their business model of offering a limited product assortment at very low prices has put pressure on other retailers and suppliers. The document examines Aldi and Lidl's operations and growth in different European countries and suggests their business approach could significantly impact retailers in other parts of the world as well.