Manufacturers try to persuade people to buy their products. Businesses use advertising to gain new customers and increase sales. Individuals, political candidates and their parties, organizations and groups, and the government also advertise. The armed forces uses ads to recruit volunteers. Special interest groups promote a cause or try to influence people's thoughts and actions.
Politicians use ads to try to win votes.
And people advertise in newspapers to sell cars, homes, property, or other items. You can vote on it, comment on it, discuss the underlying innuendoes, and hopefully even get your comments read by some of the leading advertising agencies in the world. Some are novel, some funny. Many moved viewers to buy, a good number moved them to tears. This comprehensive website provides articles on advertising, a practical guide to advertising, parent guides and more.