It enables you to break "user agent cloaking." Say you have a competitor, who nocaches, ie he doesn't allow you to see what google has in his cache. But the short "summary" from google does not seem to agree with the real contents of his website. You want to know, what does the google spider see when it indexes his website -- since the googlebot is seeing something that you are not. That's what this is about. Geddit? Welcome to SEO. thomas. PS this only works for user agent cloaking, not ip cloaking, as has been stated in the thread already.