Illustrative (adjective)

1. Serving to illustrate; explanatory; clarifying.
2. Showing by example.

Origin:

From latin illustrativus, from illustrare "to enlighten, to make clear".

Examples:

1. This graph is illustrative of the trend in the stock market over the past year.
2. The teacher gave several illustrative examples to help the students understand the concept.
3. He provided an illustrative diagram to help explain the process.
4. The illustrative story helped the audience grasp the moral of the tale.
5. The illustrative photographs in the brochure helped to sell the vacation package.