Nail polish remover is a liquid solution used to dissolve and remove nail polish from the nails. It typically contains solvents like acetone or isopropyl alcohol, which break down the polish for easy removal. Some formulas are designed to be gentler on the nails and skin, often including moisturizing ingredients. There are two main types of nail polish remover: acetone-based and non-acetone-based. Acetone is more effective for removing stubborn or glitter polishes, while non-acetone removers are milder and less drying. Both types are widely available in stores and can be used with cotton balls or pads for application.