Direct marketing involves specifically targeting individuals or companies to sell products, generate new business, or raise awareness of an organization. It uses customer databases and computer-generated letters to directly contact potential customers. Benefits include convenience for buyers and lower costs and improved efficiency for sellers. Direct marketing has grown significantly with improvements in delivery services, computer power, and databases. Common forms include direct mail, telemarketing, catalog marketing, and digital channels like the internet and mobile messaging. Public policy concerns relate to potential customer irritation, unfair practices, privacy issues, and deception.