Which product is often recommended for enhancing curl definition?

Gel is often recommended for enhancing curl definition because it has a strong hold and can help to shape and control curls. The properties of gel allow it to create a film over the hair, which can define each curl while reducing frizz and maintaining the hair's natural texture. When applied to damp hair, gel helps to lock in moisture and provide a firmer structure to the curls, promoting longevity in the curl pattern throughout the day.

In contrast, hairspray is generally used to provide a finishing touch and hold hairstyles in place after styling, rather than enhancing the definition of curls. Conditioner primarily focuses on moisturizing and detangling hair, and while it may contribute to curl formation by providing hydration, it does not hold the curls in place. Serum typically adds shine and can help control frizz but lacks the ability to enhance curl definition as effectively as gel. Thus, gel stands out as the most suitable choice for those looking to define and enhance their curls.