cloaking is a SEO technique in which content present in user's browsher is different from content presented in search engine. 1.Cloaking is not beneficial to seo. 2.It is black hat seo method. 3.It is a door way page technique. 4.It is non ethetical technique. It can be done by many methods:- 1.Identifying the page which they coming from. 2.Identifying the browser programme which is making the request. 3.Using the session data. When any web master doesn't wants to show their any web page on search engine.then he should do cloaking. Cloaking can be used to :- 1.Change the identity of the site depending on who accessed it. 2.Provide search engine bots ,content optimize for best result.