In what force of doorways?
Advantages and lacks of use the doorways for promotion in search systems.
And that was not questions of type “That such is doorway? “, I shall answer at once. Doorway is the automatic generated page (site) more often filled by the senseless text and intended for reception of the traffic from search systems, on means of an automatic redirect.
So in what of advantage of use doorway:
1) Simplicity of creation and use. To generate some thousand doorways for short time use the special programs named by doorway generators (for example, best of Win generators Aggress Doorway Generator).
2) Сheap applications. For accommodation doorways, often use free hostings, for example narod.yandex.ru for the Russian traffic and blogger.com for the English-speaking traffic.
3) Flexibility. Doorways it is possible to use not only for attraction of visitors, but also for links to your projects, that is not strong, but will lift weight of your sites.
4) Profitableness. By means of doorways it is possible to earn not the bad sums from several dollars up to several thousand per day. To be convinced of it it is possible having registered in partner programs Umaxlogin, Peakclick, Videoscash for the English-speaking traffic or Rupoisk for Russian the traffic, and Looks on section Top Webmasters in admin part.
Lacks of use doorways:
1) Not ethically. To much to not like to come across on doorways in search systems, not looking at that that, as a rule, the redirect occurs on a site of that subjects which they searched.
2) Not authorized advertising. That doorways began to take good positions in the search systems, many apply dispatch of references to the doorways in guest books and forums that is natural to not like owners of resources. It perhaps most basic of lacks.
3) Ban. Search systems often Ban doorways, that forces founders doorways to create constantly new and to search under them new free hostings. As it is not rare ban sites referring on doorways.
More intresting seo articles here
Wish to add the list of advantages and lacks of doorways? Favour I ask in comments.)