Ms Paint is commonly used for drawing because it provides a simple and user-friendly interface that allows users to create basic drawings and illustrations. It offers a variety of tools such as brushes, shapes, and colors, making it suitable for both amateur and professional artists. Additionally, it allows users to easily edit and manipulate their drawings, providing options to resize, crop, and add text. Overall, Ms Paint is a popular choice for drawing due to its accessibility and versatility in creating visual art.