A hydrating serum is a lightweight skincare product designed to deliver moisture deep into the skin. It typically contains ingredients like hyaluronic acid, glycerin, and vitamins that help attract and retain water, making the skin appear plump and healthy. Hydrating serums are often used after cleansing and before moisturizing to enhance overall hydration. These serums are suitable for various skin types, including dry, oily, and combination skin. They can be applied daily, both in the morning and evening, to improve skin texture and reduce the appearance of fine lines. Regular use can lead to a more radiant and youthful complexion.