Rich Snippets Testing Tool Beta
Rich Snippets allows you to enhance your Google search results by marking up web pages with Microformats, RDFa or Microdata.
Rich snippets can boost your site's performance dramatically in two major fashions, by increasing visibility to the search engines, improving CTR (click through rate) and building greater profitability.
RDFa ("Resource Description Framework in attributes") is having its five minutes of fame: Google is beginning to process RDFa and Microformats as it indexes websites, using the parsed data to enhance the display of search results with "rich snippets." Yahoo!, meanwhile, has been processing RDFa for about a year. With these two giants of search on the same trajectory, a new kind of web is closer than ever before.