Sketches are quick drawings that capture the basic shapes and ideas of a subject. Artists often use sketches to practice their skills or to plan out larger works, like paintings or sculptures. These drawings can be simple lines or more detailed representations, and they help convey the artist's thoughts and creativity in a spontaneous way. Many famous artists, like Leonardo da Vinci and Pablo Picasso, created sketches as part of their artistic process. Sketches can also be found in various fields, such as architecture and fashion design, where they serve as blueprints or concepts for more complex projects. Overall, sketches are a vital tool for visual expression.