Markers are writing instruments with liquid ink, used to mark or color various surfaces such as paper, cardboard, plastic, or other materials. They come in a variety of colors and tip thicknesses to meet different needs and preferences. Markers can be permanent or washable, water-based or alcohol-based, and are used in a wide range of applications, including in art, drawing, illustration, coloring, note-taking, presentation, and more. Easy to use and versatile, markers are popular tools in offices, schools, and at home, as they can be used by both children and adults in various creative and practical activities.