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Serving a different page to a search engine spider than what a human visitor sees. This technique is abused by spammers for keyword stuffing. Cloaking is a violation of the guidelines of most search engines and could be grounds for banning
Similar to a cloaking, where the page that exists only to drive traffic to another page. Doorway pages rarely are written for human visitors. They are written for search engines to achieve high rankings and drive traffic to the main site. Using doorway pages is a violation of the most search engine guidelines and could be grounds for banning.
A technology by which a webmaster can deliver customized advertising based upon the IP address of the visitor. It allows a site to serve local language or content to specific visitors. Is the technology used in cloaking, to identify search engine spiders from their IP address and route them to different version of the requested page. Can be used ethically to route spiders around dynamic webpages which require a database query, to simpler pages that spiders can process. All the while avoiding duplicating content.
An alternative domains for a companies web site. They are secondary domains, but are integrated with the main domain so the spiders visit them. Promotional domains are often built if the primary domain has problems with the engines. Used in cloaking and smamming.
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