We buy them primarily as a result of promotion .
Promotion is a part of our daily lives.
The clothes we choose to wear and the food we choose to eat are almost entirely the result of promotion. Promotion is one of the major elements of the marketing mix of the business. Promotion is a form of persuasive communication, or getting others to do what you want them to do. Its function is that of informing consumers about a product or service and influencing them to buy that product or service. There are many different promotional tools that are used by businesses to enhance the image of the product, such as mailings, speeches, presentations, contests, packaging, films, catalogs, coupons, posters, and even endorsements by famous people.