A shampoo massage brush is a handheld tool designed to help exfoliate and massage the scalp while shampooing. It typically features soft silicone bristles that help to deep clean the scalp, promote blood circulation, and provide a relaxing and enjoyable experience. The brush can also help to distribute shampoo and conditioner evenly through the hair, and it's a great way to gently remove any buildup or residues from styling products. Overall, using a shampoo massage brush can help improve the health of the scalp and enhance the effectiveness of hair care products.