Spray drying is a method used to convert liquid solutions or suspensions into dry powder. In this process, the liquid is atomized into fine droplets and then exposed to hot air in a drying chamber. The heat evaporates the moisture quickly, leaving behind dry particles. This technique is commonly used in the food industry to create powdered products like milk powder and instant coffee. It is also utilized in pharmaceuticals and chemicals to produce fine powders that are easy to handle and store, ensuring longer shelf life and convenience in use.