What are items consumers receive free of charge in return for making a purchase?

Items consumers receive free of charge in return for making a purchase are often referred to as "promotional items" or "free gifts." These can include samples, bonus products, or branded merchandise designed to enhance customer loyalty and encourage repeat purchases. Retailers and brands frequently use these incentives as part of marketing strategies to attract customers and differentiate their offerings. Examples include buy-one-get-one-free offers, complimentary samples, or promotional gifts with larger purchases.