Airless spraying is a painting technique that uses a pump to force paint through a spray gun without the use of compressed air. This method allows for a smooth and even application of paint on various surfaces, making it ideal for large areas like walls and ceilings. The high pressure helps to atomize the paint, creating a fine mist that adheres well to the surface. This technique is commonly used in both residential and commercial settings, as it can significantly reduce the time needed for painting projects. Airless sprayers are often preferred for their efficiency and ability to cover surfaces quickly, resulting in a professional finish.