Since Google rolled out rich snippets in 2009, webmasters have spent time adding markup to their web pages to improve their listings in search results. Thanks to steady adoption by webmasters, using microdata, microformats or RDFa, Google now see more than twice as many search results with rich snippets in the US alone compared to one year ago, and a four-gold increase globally.

Many webmasters still struggle to implement the rich snippets markup correctly. To help address this, Google have added new error messages on their testing tool to notify the webmaster to fix any problems with the markup, within Webmasters Tools.