Doorway pages are low quality webpages created solely for the purpose of ranking for keywords.
Each poor quality page is optimized for a keyword or a keyword phrase.
The users who find this kind of webpage by querying a keyword will be redirected to some other URL. Doorway pages are really frustating from the user point of view and punishable from search engine point of view.
Do not indulge in practices to manipulate searchengines and deceive users.
Website optimization Chennai Adwords Consultant