Good one on Sitelinks

Sitelinks also factor into your ad rank, and can influence the position of your ad on search page. Ad Rank previously took into account your max cost-per-click (CPC) and quality score, and now ad extensions and formats are another component of the calculation.

Seems like a no-brainer to implement, right?

Surprisingly, many clients are still not taking advantage of this feature. Google actually noted this in a blog post in January. After some extensive research, I found a surprisingly small number of customers are taking full advantage of the benefits of sitelinks. In the example below, Merry Maids is using the traditional sitelink format; the two other businesses aren’t using sitelinks at all.

http://searchenginewatch.com/article/2332798/Take-Your-Sitelinks-to-the-Next-Level-With-Descriptions