Direct marketing

Direct marketing is a sub-discipline and type of marketing. There are two main definitional characteristics which distinguish it from other types of marketing. The first is that it attempts to send its messages directly to consumers, without the use of intervening media. This involves commercial communication (direct mail, e-mail, telemarketing) with consumers or businesses, usually unsolicited.
The second characteristic is that it is focused on driving purchases that can be attributed to a specific "call-to-action." This aspect of direct marketing involves an emphasis on trackable, measurable positive (but not negative) responses from consumers (known simply as "response" in the industry) regardless of medium.
If the advertisement asks the prospect to take a specific action, for instance call a free phone number or visit a website, then the effort is considered to be direct response advertising.
The term direct marketing is believed to have been first used in 1961 in a speech by Lester Wunderman, who pioneered direct marketing techniques with brands such as American Express and Columbia Records. The term junk mail, referring to unsolicited commercial ads delivered via post office or directly deposited in consumers' mail boxes, can be traced back to 1954. The term spam, meaning "unsolicited commercial email", can be traced back to March 31, 1993, although in its first few months it merely referred to inadvertently posting a message so many times on UseNet that the repetitions effectively drowned out the normal flow of conversation.