Cloaking and Doorway Pages?

[alacefrostor]

I have heard about Cloaking but I am little confuse about Doorway pages. What is it? Cloaking is affect to affiliate site links and this method creating two pages one is for human and another is for web spiders or search engine bots. But what is procedure for Doorway pages? Is it similar to Cloaking?

 

[philbertabrwn]

In seo terms, cloaking means your your site present the different version of web page content for search engine spiders and human visitors on their browser. its a unethical methods to cheat search engine for increase the ranking of particular keywords.