A piping tip is a small metal or plastic nozzle used in cake decorating to create various shapes and designs with icing or frosting. These tips come in different sizes and styles, allowing decorators to produce everything from simple lines to intricate flowers. They are typically attached to a piping bag, which holds the icing and allows for controlled application. Piping tips are often categorized by their shapes, such as round, star, or leaf, each serving a specific purpose. Popular brands like Wilton and Ateco offer a wide range of tips, making it easy for both beginners and professional bakers to enhance their creations.