How many back links you have for your site in Google's knowledge is what we call Google Site links. You might have different number of total back links and Google Site links.
The link which is listed by Google for your website is called Google site-link. It is also called Google back-link. You can check it by typing link:your domain full address on Google's address bar. It will shows all back-link for your website according to Google.
Sites who gain enough authority and reputation gain this feature showing the site is a being trusted and worthy.
When your site has been listed in the Google search engine, it also shows sub pages of the sites in the search engine. These sub pages are known as the Google site links. Only the important pages has been listed in the site links. 347design.com
The link which is listed by Google for your website is called Google site-link. It is also called Google back-link. You can check it by typing link:your domain full address on Google's address bar. it display the result.