"Buy one, get one free" is a popular sales promotion where customers can purchase one item and receive another identical item at no additional cost. This offer encourages shoppers to buy more, as they perceive they are getting a better deal. It is commonly used in retail stores, supermarkets, and online shopping platforms. This type of promotion can apply to various products, including groceries, clothing, and electronics. Retailers use this strategy to increase sales volume, clear out inventory, or attract new customers. It is important for consumers to check the terms of the offer, as some restrictions may apply.