A retailer is a business or individual that sells goods or services directly to consumers. Retailers can operate in various formats, including physical stores, online platforms, or a combination of both. They purchase products from manufacturers or wholesalers and then offer them to customers at a marked-up price. Retailers play a crucial role in the supply chain by making products accessible to the public. They can specialize in specific categories, such as clothing, electronics, or groceries, and may include well-known brands like Walmart or Amazon. Retailers often focus on customer service and marketing to attract and retain shoppers.