A promotional code, also known as a promo code or coupon code, is a unique combination of letters and/or numbers that can be used to redeem a special offer or discount on a product or service. These codes are often provided by businesses as a way to entice customers to make a purchase or take advantage of a promotion. They can be found on advertisements, websites, or through email and are typically entered at the time of checkout to receive the specified discount or offer. Promotional codes are a popular marketing tool used by businesses to attract and retain customers, and can range from a percentage off the total purchase price to free shipping or additional products or services. By using a promotional code, customers can save money and businesses can increase sales, making it a win-win situation for both parties.