Answer :
Giving directions, describing an object etc, if you're in school it depends on the subject but note taking.
Answer:
Explained
Step-by-step explanation:
Illustrations are basically examples serving to clarify or proof something. We can it either with help of example or with help of picture or video. Illustration are helpful while teaching something to somebody, it creates a better understanding. Illustrations are often more useful while pitching your ideas to others. Illustrations are widely used in story telling, for batter imagination. So, by above examples we can say that illustration are helpful in every day activities.