Doorways are sites that are created to redirect visitors to another resource. They are useless from the user's point of view. The sites are filled with meaningless content, sharpened under a certain group of keywords, and maximally use other methods of optimization and promotion, thanks to which they fall into the top for the necessary requests. When users enter the desired phrase into the search engine, they see a doorway in the search results, click on the snippet, and go to it or directly to the desired offer or pre-landing.