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.