AdWords recently announced that they are enabling Ad Sitelinks for all campaigns, which advertisers previously had to pre-qualify for. Only advertisers with very high quality scores actually saw this as an option in their accounts. Now, it’s available to all campaigns, and you should be taking advantage of it. Sitelinks allows you to link to other pages on your website with the links visible immediately below your Display URL.
Sitelinks not only acts as an extra line of ad text and provides your visitors additional navigation options, it can reportedly boost CTRs by up to 30%. To set it up, go to your campaign settings, and under Extensions, enable Sitelinks by clicking on Show additional links to my site within my ad.