Which product is commonly applied to enhance curl definition while styling?

Mousse is a lightweight styling product specifically designed to enhance curl definition and provide volume. It contains polymers that help to hold the curl shape while adding body to the hair. When applied, mousse can help create a natural, bouncy finish without the heaviness that some other products may provide.

While leave-in conditioners and styling creams do often help with moisture and can contribute to a finished style, they don't specifically aim to enhance the curl structure in the same way mousse does. Hair oil, on the other hand, is primarily used for hydration and shine rather than for holding and defining curls. Thus, mousse stands out as the go-to product for enhancing curl definition during styling.