Illustrations can help convey messages in a quicker and easier to understand way.

They can also help make a UI more interesting instead of just being full of text.

If any illustrations are included in a design they should be:

• Clarifying
• Meaningful
• Straight-forward
• Attractive
• Harmonic
• Improve Usability
• Not overloading

There are also different types of illustration that can be used:

• Mascots/Characters
• Chromatic
• Iconic
• Diagrammatic
• Data Visualisation
• Hyper realistic
• Vectors
• Hand drawn

In UI illustrations are typically used for,