When and how to use different shampooing conditioning and treatment products?

Shampoo is typically used to cleanse the scalp and hair, and it's best applied to wet hair, focusing on the roots. Conditioners follow shampooing to moisturize and detangle hair, and should be applied mainly to the lengths and ends. Treatment products, like masks or oils, can be used weekly or as needed, either on clean, damp hair for deep conditioning or as a leave-in for added moisture and protection. Tailor your routine based on hair type and needs—fine hair may require lighter products, while dry or damaged hair often benefits from richer treatments.