A discount code is a special combination of letters and numbers that customers can enter at checkout to receive a price reduction on their purchase. These codes are often provided by retailers as part of promotions or marketing campaigns to encourage sales and attract new customers. When a customer applies a discount code, the total amount due is reduced, making products more affordable. Discount codes can be found on various platforms, including websites, social media, and email newsletters, and they typically have expiration dates or specific terms of use associated with them.