Sitelinks are hyperlinks to website subpages that appear under certain Google listings in order to help users navigate the site. The site owner cannot add any sitelinks; Google adds them through its own secret automated algorithms. If you have a Google Adwords program you can create campaign and ad group level sitelinks. The site owner can, however, block individual sitelinks, which may be useful if he deems them unhelpful. In Google, there are a minimum of one and a maximum of ten sitelinks per site. According to John I Jerkovic, "Every site should strive to get sitelinks, as they imply authority as well as web presence. Sitelinks also occupy additional search results screen real estate, the space that pushes your competitors further down the results page — something to be desired." Sitelinks are also said to appear "on some search results where Google thinks one result is far more relevant than other results ".