Tony Hsieh, CEO of Zappos, discusses how the company has built a brand through focusing on customer service, culture, and repeat customers. Zappos prioritizes delivering "wow" customer service through their 365-day return policy, fast shipping, and friendly customer service representatives. They have also cultivated a strong company culture focused on core values like delivering wow through service. This emphasis on customer service and culture has led to high rates of repeat customers, with over 75% of purchases coming from returning customers.