In June 2011 at SMX Advanced Seattle, Google announced an enhancement to their Ad Sitelinks which they are calling Embedded Sitelinks. For advertisers that are currently using Sitelinks (like below) they have the potential of being elevated into your ad. This product has been launched globally, expect for China, Japan and Korea.
In order for the Sitelink to appear as an embedded link, the text must match exactly from the ad unit and the Sitelink (example below).
Since Sitelinks were launched in 2009, it has helped advertisers to provide more options when a consumer does a search by deep linking them through the website vs, just landing the users on the homepage. Since running Sitelinks we have see both CTR and Conversions Rates increase by 2x, therefore if you aren’t using Sitelinks today you might want to try them out.