doorway or gateway pages

[ans]

what happens in doorway(gateway) pages i know that it comes under black hat technique but for a seo point of view it is important to know about it.

[anusha]

Doorway pages are simple HTML pages that are customized to a few particular keywords or phrases.They are programmed to be visible only by specific search engines..The purpose of these pages is to trick the search engines to give high ranking for our sites.