Laura Sims Revitalisant Lissant Smooth and Shine refers to a product associated with the brand "Laura Sims." Based on the name, it suggests that it is a smoothing and shine-enhancing conditioner. Conditioners are hair care products used after shampooing to provide moisture, nourishment, and manageability to the hair. A smoothing and shine-enhancing conditioner typically contains ingredients that help to detangle the hair, reduce frizz, and enhance shine. These conditioners often have moisturizing properties that can help improve the overall smoothness and appearance of the hair. To use a conditioner like Laura Sims Revitalisant Lissant Smooth and Shine, it is typically applied to wet, cleansed hair after shampooing. The conditioner is usually worked through the hair, focusing on the mid-lengths and ends. It is recommended to leave the conditioner on for a few minutes to allow the ingredients to penetrate the hair and provide moisture and nourishment.