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The concept of link juice is inseparable from Google's original design. The PageRank algorithm, developed by Larry Page and Sergey Brin, rests on a simple idea: every web page holds an authority score, and every outgoing link redistributes a proportional fraction of that score to destination pages. The more authority a page accumulates, the more valuable the juice it distributes.
How link juice flows through a site
A site's homepage is generally its most authoritative page, as it receives the most external links. It then distributes this authority to the pages it links to directly, which pass it on in turn. A well-built internal linking structure creates an efficient distribution system that concentrates link juice where SEO stakes are highest.
What blocks or dilutes link juice
Several elements reduce transmission: links with the nofollow attribute (signaling Google not to follow the link), redirect chains (each hop loses a fraction of juice), 404 errors that constitute authority leaks, and too many links on a single page that dilutes the unit value transmitted to each destination.
Optimizing link juice distribution
The strategy involves identifying pages that concentrate the most authority (via received backlinks) and creating internal links toward the strategic pages you want to rank. A well-ranking article pointing to a service page transfers a portion of its authority to that page. This is the essence of every advanced internal linking strategy.
