Sitelinks are a shortcut to important information on your website. They make it possible for users to go directly to the page of the website they need.
In Yandex.Direct, you can add up to four sitelinks that lead to pages of an advertised website, a page for a product or service on Yandex.Market, or to social networks. Sitelinks are displayed both on Yandex search results pages and in the ad networks (YAN and ad exchanges). The number of sitelinks on different websites may vary.