What are Doorway Pages?
 

Doorway pages are a black hat method that should be avoided. Doorway pages are the pages search engines users first visit after clicking a search engine result before entering the real landing page. They are optimized for search engines and once the user visits the doorway pages they are automatically redirected to the real landing page.

I use doorway pages are the pages search engines like download video fb users first visit after clicking a search engine result