You're talking about PageRank Sculpting.
PageRank Sculpting translates as manipulated pagerank is something Webmaster manage the links out. Link must use no-follow to block search engines identify the relevance, the links must focus to proceed to link to Web sites.
* In the world of SEO, the link is not just merely a bridge to connect from Site A to Site B, but also the key to the search engines evaluate the relationship between the two sites. With every page, every day for hours of Search Engine drop beetles access and crawl the links on the site to determine three issues: This page "talking" about something, the other sites, "says" what about this page and this page's position compared to other pages (pagerank).