Customers frequently want to see how a piece of clothing will look on them, but this is impossible to do when all they can see is it hanging still on a rack. A retailer can provide customers a more accurate and personal portrayal of how an item will look when worn by the customer or the person for whom the customer is shopping by dressing display mannequins in it. The ability to imagine clothing modeled on a "human figure" is critical to the overall decision-making process.
https://medium.com/@arthursmiths407/different-types-of-mannequins-for-your-retail-store-d129b032cff0