In the vocabulary of modern everyday life Internet user securely attach the word spam. Under this concept means, basically, unsolicited mass distribution of different kinds of advertising via e- mail and other methods of Internet communication. These lists are automated, anonymous, and are carried out both for commercial purposes and do not pursue such. History of spam originates from intrusive and pervasive advertising campaign canned ham brand 'Spam'. After that, any kind of intrusive advertising messages are received by the recipient without his consent, and are referred to as spam. At present, day such mass mailings have become a real scourge for the virtual world. They are universally condemned by users on the network, causing huge damages arising as to the need to pay for time traffic to receive the message, and with a huge extra burden on information resources and systems.

Legislation of most countries provide some responsibility, including criminal, for the distribution of spam, but if the West such lawsuits have become the norm, and control over the purity of the traffic is even at the state level, the post-fight against unauthorized deliveries only You can count on a certain return, because the recipients of the advertisement, in this case, will be the millions of potential consumers of advertised goods and services. But on the other hand, because of the extreme negative the vast number of Internet users to spam, to rely on enhancing the image and reputation of the company advertised in this way is not necessary. In addition to the unauthorized information mailing, the term spam is firmly entrenched, more recently, in the context of search engine optimization internet resources. In an effort to occupy the top positions in major search engines, many SEOs have resorted to unethical practices of so-called search engine spam, which consists in the use of 'invisible' text, excessive keyword popular custom words, doorways, cloaking, swap and other arrangements for deceive search engines.