Cloaking (A Big Google No-No)

Straight from Google's website: "The term "cloaking" is used to describe a website that returns altered web pages to search engines crawling the site. In other words, the web server is programmed to return different content to Google than it returns to regular users, usually in an attempt to distort search engine rankings. This can mislead users about what they'll find when they click on a search result. To preserve the accuracy and quality of our search results, Google may permanently ban from our index any sites or site authors that engage in cloaking to distort their search rankings.

"If your website or web pages are set up to display different information for a search engine spider versus a real person, then you are cloaking. Cloaking delivers one version of a page to an Internet user and a different version to a search engine. The cloaked page is packed with keyword and terms that the site wants to be highly rank for so, in essence, they are cheating. There are good reasons for cloaking as well, such as targeted advertising, but if you are trying to manipulate your rankings you should put an end to this immediately.