An ad extension in Google Adwords that appears below the main ad copy which links to a specific page on the website (i.e. Contact Us, About Us, etc.). Ads can have from 2-6 sitelinks.
A type of rich result that shows links to various pages on a website, resulting in a larger listing for the website on the SERP. Sitelinks are sometimes automatically generated by search engines if deemed relevant to the user’s search query.