Agent page delivery can solve common gateway page-building problems. With agent delivery, you can design a page for Excite that doesn't include meta tags, but rather focuses on keyword weight. You can then design an additional page that includes stragetic use of meta tags to attract AltaVista's spider. Unlike Meta Refresh and optimized HTML, agent page delivery targets the agent and not the actual viewer. You send the agent to a page specifically suited to its requirements, while sending the viewer to your Web site's actual content.
Webmasters sometimes use bridge pages or doorway pages to improve traffic.
This describes how they are technically implemented, such as using cloaking, and some of the problems they have CGI-Common Gateway Interface A highly technical description of CGIs. This article explains why gateway or doorway pages may be necessary to achieve a higher ranking for certain keywords on selected search engines. An introduction to Spamming, the practice of using unethical or unprofessional techniques to try to improve search engine rankings. This site talks about the different types of Gateway pages and how to make one. Contains other useful links.