Door way pages

hi..
plz u tell me What is the door way pages?

Webmasters are sometimes told to submit "bridge" pages or "doorway" pages to search engines to improve their traffic. Doorway pages are created to do well for particular phrases. They are also known as portal pages, jump pages, gateway pages, entry pages, and by other names as well.
Doorway pages are easy to identify in that they have been designed primarily for search engines, not for human beings. This page explains how these pages are delivered technically, and some of the problems they pose.

door way pages is a technique of creating multiple pages with small text redirect to your main site. This is Black hat SEO technique.

Doorway Pages are considered as one of the entry point which specifically made for a some specific keyword to rank it well in the search engine result page and it helps in redirecting the visitors to them main content of the website. Frequent use of Doorway pages results into bad reputation and spamming. So, Doorway pages are considered as one of the Black Hat SEO technique. Hope this will help you in getting some idea about Doorway Pages.