An illustration is a decoration, interpretation, or visual explanation of a text, concept, or process, designed for integration in print and digitally published media, such as posters, flyers, magazines, books, teaching materials, animations, video games, and films. An illustration is typically created by an illustrator.

• An illustration should convey an idea in a very clear and simple way.
• Any piece of writing can be enhanced by drawings and images, whether you want to tell a story or teach a lesson.
• The advertising industry relies heavily on the use of illustrators.