Painting is important to learn because it's a valuable creative outlet for a person. The act of painting can provide hours of pleasure in an artistic way. If you paint every day, you can improve your painting skills, much like how you might improve your musical abilities by practicing a musical instrument every day.
When you paint, you can create different types of subjects. One day, you might try a landscape painting, and on the next day, you could attempt a still-life painting, and so on. Painters can also depict a visual illustration of a certain personal scene or memory on a canvas, which can evoke feelings of nostalgia in the painter's life.