"Smudge" is a term often used to describe a mark or stain that is unclear or blurred. It can refer to anything from a smudge of ink on paper to a smear of dirt on a surface. Smudges can occur accidentally and are typically unwanted, as they can obscure the clarity of an object or image. In the context of art, a smudge can be a technique used by artists to create soft edges or blend colors. For example, charcoal artists often use their fingers or tools to smudge their work, achieving a desired effect. Smudging can enhance the depth and texture of a piece, adding to its overall visual appeal.