Advertising is a form of marketing communication used to promote or sell a business's products and services. The purpose is to turn consumers toward a brand by associating it with positive qualities. Advertising messages are paid for and distributed through various media channels. Both commercial and non-commercial entities use advertising to promote their brands, products, services, or ideas, though non-profits may use unpaid public service announcements. Creating an effective advertisement involves defining the product and objectives, understanding the target market, selecting an appropriate media channel, and developing messaging to persuade consumers.