Cross-link term explained
Cross-link or is the through link which is located on every page of a site . Cross-link unlike a normal link have a different effect on the acceptor. Usually this effect is below links from index page, but the above links from inner pages of the website.
Cross-link in the sidebar is often affixed on the site of the similar topics partner.
Cross-link in the footer is most often the sites that have been involved in the development of this resource supported by: design studios, advertising agencies, the developer of the template.
In the presence of through links in backlinks profile to the acceptor flows more link juice, so to have through links in the backlinks is very beneficial by SEO point of view.