Gel pens are writing instruments that use a water-based gel ink, which provides a smooth and consistent flow. This type of ink allows for vibrant colors and a glossy finish, making gel pens popular for both writing and artistic purposes. They are often used in schools, offices, and by artists for their ease of use and ability to create fine lines. These pens come in various tip sizes, allowing for different line thicknesses, and are available in a wide range of colors, including metallic and glitter options. Many people enjoy using gel pens for journaling, scrapbooking, and crafting, as they can add a creative touch to any project.