A sketch book is a blank notebook or pad of paper used by artists, designers, and creatives to explore their ideas through drawing, doodling, and sketching. It provides a space for individuals to capture their thoughts, observations, and visual concepts using pencils, pens, or other artistic tools. A sketch book serves as a portable canvas for experimentation, brainstorming, and refining artistic skills, making it an essential tool for anyone seeking to express their creativity on paper.