Originally Posted by sandrajolly
A doorway page is a technique used when trying to influence (improve) your web rankings in the search engines by creating a special page packed full of keywords and other techniques. See definition below.
It doesn't direct you to another site, it is a special page you create in order to get visitors using the search engines to find your site.
Google doesn't like doorway pages; it sees creating doorway pages as deliberately trying to cheat on your positioning in the search engines.