Answer:
A sketch may serve a number of purposes: it might record something that the artist sees, it might record or develop an idea for later use or it might be used as a quick way of graphically demonstrating an image, idea or principle. Sketching is the most inexpensive art medium. Sketches can be made in any drawing medium.
Explanation:
Sketching allows us to get our ideas down quickly without overthinking them, or even dismissing them before they've even left our brains. It allows us explore ideas and to clear our minds, brainstorm, plan things out quickly and think away from the restrictions of the computer screen
