http://websitesubmit.hypermart.net/metatags.htm
Meta Tags are HTML tags used to control your site description in the search engines that support them: Google, Yahoo, MSN Search, AOL Search, AltaVista, AllTheWeb (FAST), HotBot, Lycos, Infoseek (Go), Excite, and WebCrawler. It is important to have well made meta tags because they can help increase your Search Engine position.