Walmart has achieved significant success and growth since Sam Walton opened the first store in 1962. It has expanded to over 7,800 stores globally and 2 million employees, becoming the largest retailer in the world. Walmart thrives during economic downturns as consumers flock to its low prices. Key factors in its success include strategic targeting of rural communities with lower costs, strong management practices, cost control, distribution network, and embracing employee ideas.