Doorway Page

A doorway page is a page with the only purpose to link to the actual website. Doorway pages are optimized for search engines in order to increase the actual website's ranking. Usually it has little content on it, is stuffed with keywords and doesn't offer any valuable information to visitors.

It's not linked on the actual website and accessed only by search engines that read the source code.

Because such pages don't offer any valuable information to the visitor, their use can negatively affect the website's ranking. In the worst case this can mean that the whole website is removed from the search engine index1). Avoid using such pages.