A hang tag serves the purpose of providing important information about a product to the consumer. It typically includes details such as the brand name, product name, size, price, and care instructions. This allows the consumer to make an informed decision about the product and understand its features and specifications. Additionally, hang tags can also serve as a marketing tool, as they can be designed to reflect the brand's image and convey its values. Overall, the purpose of a hang tag is to enhance the consumer's shopping experience by providing relevant information and promoting the brand.