Advertising is anything that calls attention to a specific product or service. It's aim is to increase the sells and profit. The animation is used in advertisement to give a feeling of reality and aliveness. It also helps to explain the product or service and get to the point quickly.
This is important because it makes us be able to tell stories and communicate emotions and ideas in a unique, easy-to-perceive way that both small children and adults can understand. Animation has helped connect people throughout the world in a way that sometimes writing and live-action films cannot.