Direct mail is a type  of direct marketing in which businesses send letters, postcards or other promotional materials to past, current or potential customers or clients. Direct mail campaigns may be targeted to either a consumer or business or both.  In many cases, the mailing is directed to a target demographic (i.e. home owners) or geographic market (i.e. a specific neighborhood). In most cases, it's mass or bulk mailing, but you can send direct mail in smaller quantities as well. 

Push marketing is a proactive technique that enables e-marketers to "push" their product/service information to Web visitors or shoppers without their requesting it. Banner advertising, pop-up advertising, e-mail promotion, and spamming belong to push marketing. For instance, e-marketers can rent designated space from Internet service providers such as America Online or MSN for their banner or pop-up ads. Using animated graphics, appealing messages, and links, e-marketers try to lure visitors to their sites to buy their products or services. Many Internet users, however, find such ads annoying and employ software that blocks pop-ups and banner ads. <
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