Which product is commonly used to enhance the definition of curls?

The product commonly used to enhance the definition of curls is gel. Hair gel is specifically formulated to provide a strong hold and often contains ingredients that help to define and separate curls. When applied to damp hair, gel can help to shape the curls, allowing them to maintain their form and bounce throughout the day. It provides a level of control that helps to prevent frizz and supports the natural curl pattern.

Shampoo, while essential for cleaning hair, does not have the properties needed to enhance or define curls; instead, it would strip hair of necessary oils and moisture. Conditioner is primarily used for moisturizing and detangling hair, but it won't provide the strong hold or definition that curls need. Hairspray, while useful for setting a style, is typically used after the hair has been styled and doesn’t directly enhance or define curls in the same way that gel does.