The Difference Between Art and Illustration
Illustration art is not art in the literal sense of the word. Art is created to express the inner world of the artist, while an illustration is created to explain an idea. The main goal of a work of art is aesthetics. The main purpose of an illustration is to explain. An illustration is created for the needs of a specific customer with specific goals, and a work of art can be made without it. Good illustrators always think about their viewers' and their clients' aims.
Graphic Design vs. Illustration: What Are the Differences?
Usually, graphic designers work with ready-made objects, and their task is to create suitable compositions from them. Illustrators create products themselves (even if they are collages).
The main task of the designer is to create a successful product that will meet the requirements of the customer and the needs of the target audience.
A good illustrator will also think about the needs of their client and target audience, but should be more focused on the image itself, rather than on marketing goals—which the designer has already thought about!