In February, Google announced enhanced site-links on desktop search ads. They display enhanced site-links by combining multiple site-links and closely related search ads into a larger nested format.
Early testing showed that enhanced site-links could make ads that appear above the organic search results even more useful. And they could lead to significantly higher click through rates for an advertiser than regular 2-line and 3-line sitelinks.
Over the last several months, Googles continued to improve the ad systems for creating enhanced sitelinks and determining when they’re most useful. Now, They’ve begun to roll them out in all countries where AdWords is available.
Like other forms of sitelinks, enhanced sitelinks are generated automatically so they might vary in appearance. And you might not see them show 100% of the time even when you’re eligible.