Link Building Fundamentals
Link juice is the ranking power that flows from one page to another through a hyperlink. When a strong page links to yours, some of its authority passes across — and your page ranks a little easier because of it. The industry's formal term is link equity; "juice" is just the way SEOs have talked about it since the early days, and the metaphor stuck because it genuinely behaves like a liquid: it flows, it splits, and it can be wasted.
Understanding how link juice moves is the difference between a site where authority pools exactly where you need it and a site that leaks its hard-earned equity into pages nobody searches for.
Where the idea comes from: PageRank
Google's original algorithm, PageRank, modelled the web as votes flowing through links. Every page holds a certain amount of ranking value; every link out shares a slice of that value with its destination. Pages accumulating the most value — directly and through the pages linking to them — ranked highest.
Google stopped publishing PageRank scores years ago, but it has confirmed the underlying system still runs in some evolved form. PageRank flow is what link juice describes informally, and tools like Ahrefs (UR/DR) and Moz (PA/DA) publish their own imitations of it — see our guide to domain authority for how those scores work.
How link juice flows between pages
Five rules govern the flow, and together they explain most internal-linking strategy:
1. Stronger pages pass more
A link from a page that itself has powerful backlinks passes far more equity than a link from a forgotten page nobody cites. This is why one mention on a national news site outweighs fifty on small blogs.
2. The juice splits between every link on the page
Classically, a page's transferable equity divides among all its outbound links — internal and external alike. A link from a page with 5 links hands you roughly ten times more than a link from a page with 50. It also means your own pages stuffed with hundreds of navigation links dilute what each individual link passes.
3. Nofollow gates the flow
Links marked rel="nofollow", sponsored or ugc generally don't pass equity — the full story is in our dofollow vs nofollow guide. The classic trick of "PageRank sculpting" (nofollowing internal links to hoard juice) was neutralised by Google in 2009: the equity assigned to a nofollowed link simply evaporates rather than redistributing. Sculpt with page structure, not rel attributes.
4. Relevance concentrates it
Modern ranking systems weigh topically related links more heavily. Equity flowing between two pages about the same subject does more work than the same link between strangers — one reason a tight topic cluster outranks a scattered site of equal authority.
5. Redirects and broken links change the plumbing
A 301 redirect passes essentially all of its equity to the new URL — but a chain of redirects leaks a little at every hop and slows crawling. A 404, meanwhile, is a severed pipe: every backlink pointing at a dead page pours its juice onto the floor. Redirecting dead URLs that have backlinks is some of the cheapest SEO work that exists.
Internal links: the flow you fully control
You can't dictate who links to you — though placements on relevant publications, like those in our site network, are how you influence it — but inside your own site you decide exactly where equity goes through internal linking. Three practical moves:
- Feed the pages that earn money. Your homepage and top-linked posts hold the most juice. Link from them — prominently, in the body — to the pages you most need ranking.
- Build hub-and-spoke clusters. A pillar page links down to every cluster article; each article links back up and sideways to its siblings. Equity circulates within the topic instead of leaking away — it's exactly how our link building guide and this series are structured.
- Rescue orphan pages. A page with no internal links pointing to it receives no internal juice at all, however good its content. Every page worth indexing deserves at least two or three contextual internal links.
How to spot where your juice is going
- Find your most powerful pages — in Ahrefs (Best by Links), Search Console (Links → Top linked pages) or any crawler. These are your reservoirs.
- Check what they link to. Are your reservoirs passing equity to priority pages, or to your privacy policy and a 2017 announcement?
- Crawl for leaks. Screaming Frog or similar will surface 404s with inbound links, redirect chains, and orphan pages in one pass.
- Fix in order of pressure: redirect dead linked-to URLs first, then add internal links from strong pages to target pages, then flatten redirect chains.
What link juice is not
A few myths worth retiring: it is not a literal score you can read anywhere (every public metric is a third-party estimate); it does not pass through mentions without links; outbound links do not "drain" your site in any way worth worrying about — linking to good sources is healthy; and buying high-juice links is not a loophole, it is the exact behaviour Google's spam systems are trained on.
Frequently asked questions
Does every backlink pass link juice?
No. Nofollow/sponsored/UGC links generally don't, links from pages Google has devalued pass little or nothing, and links from utterly irrelevant spam may be ignored entirely. Equity comes from followed links on credible, crawlable pages — which is what makes counting referring domains more honest than counting raw backlinks.
How long does it take for link equity to show in rankings?
The link must be crawled first, then rankings typically shift over weeks. Internal linking changes on an already-crawled site often show faster than new external links. If you would like a second pair of eyes on where your equity is leaking, drop us a line.
Is link juice split equally between links on a page?
The classic model said yes; the modern reality is Google weighs links by position and context — a body link counts more than a footer link. Assume prominent, editorial placement gets the biggest share.