Darvey – SEO WIKI
A doorway is a site created to redirect users to another promoted site.
Such a site is useless for the user, who often just does not have time to consider it. The text contained on the doorway page, as a rule, does not make sense and consists mainly of a set of keywords. Doorways clog the Internet, so all search engines fight them.
Doorways are divided into three types:
1. White – law-abiding sites that contain meaningful content and graphic design.
2. Gray – sites whose main purpose is the transfer of link weight. These sites post unique texts in which links are inserted.
3. Black – sites that automatically redirect to a promoted Internet resource. Texts on such sites are meaningless.