Creation and promotion of two or more sites of one company by the same needs to attract more traffic to their sites, may lead to the imposition of affiliate filter. In other words, affiliate filter are put onto the sites that are moving in the top one and the same owner to increase the overall traffic and consequently sales. Why is this happening? What is the meaning to throw quality sites from the search, only because they have one owner and they advertise one type of goods? That’s general search quality deteriorates because of advertising one type of commodity.

Everything started with the cunning optimizers who did not want to lose their customers, and began to create and promote a few sites on the same request, thereby sometimes occupying the entire top issue for particular queries. As a result, search engines have begun to actively fight for the quality of search, which worsened the sites-affiliates. According to Wikipedia affiliate resource is a website without giving the user fundamentally new useful information in relation to the other site of the same owner or the same direction (for example, the second site by the same company, although it is not a mirror of the first).

There are a number of grounds according to which the search engine can understand whether the website is affiliated or not:
- the coincidence of the contact data in the domain registration. In other words, the potential sites of affiliates being registered for one person;
- coincidence contact information on the websites (phone number, address, office location, etc.);
- the same link mass;
- similar textual content sites;
- the same ip-address from the sites;
- location on one hosting or server;
- cross-range of products and services;
- reciprocal or similar links;
- sites on the Internet represent the same organization/company;
- information on sites is dedicated to the same/similar goods and services provided by the company;

The filter can be imposed either automatically or manually. If being imposed manually if the colleges of the exact search engine system gets a message from your competitors. This method is called to stooge. The lack of new useful information and contact details of the coincidence site for affiliates is the most important factor when deciding on affiliation.

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