What is cloaking?

[jremsen]

I read that Cloaking means Determining which search engine spider is visiting a web page and then giving each spider a page optimized for it's particular algorithm. Is This method of search
engine optimization a legal one? Will I not be penalized for this action?

[nigelzephyr]

cloaking is one of the black hat techniques.
there are so many ways to promote your site, so im advising you not to use this one,

[nacolwhite]

Cloaking is a technique which helps you to Offering a different set of web pages to the search engines