What Is Link Juice?
Link juice is an informal term used within the SEO community to describe the flow of ranking authority from one webpage to another via hyperlinks. When a reputable website links to your page using a standard dofollow link, it passes a portion of its accumulated PageRank or authority to your page. This transferred authority is colloquially referred to as link juice.
The concept originates from Google's PageRank algorithm, which treats each link as a vote. Pages that accumulate many votes from credible sources develop high PageRank. When those pages link out to others, they share some of their PageRank with each linked page. The amount of juice passed depends on several factors: the total PageRank of the linking page, the number of other outbound links on that page (PageRank is divided equally among all outbound links), and whether the link is dofollow or carries a nofollow attribute (which blocks juice transfer).
Understanding link juice has practical implications for both off-page SEO (link building) and on-page site architecture (internal linking). From an off-page perspective, a single dofollow link from a high-authority domain can deliver more benefit than dozens of links from low-authority sites. For South African businesses, this means a feature in a publication like BusinessDay or a link from a government .gov.za or university .ac.za domain is worth pursuing more aggressively than numerous directory listings.
Internally, link juice flows through your own site when you link between your pages. Your homepage typically accumulates the most juice, being the most linked-to page from external sources. By linking from your homepage or other strong pages to your priority service or category pages, you channel some of that accumulated authority to the pages you most want to rank. This is why a well-structured internal linking strategy is an important, and often underutilised, aspect of on-page SEO.
Link Juice In Practice
The scenario below is an illustrative example, not a Juicy Designs client result. The figures indicate the scale of effect that internal linking work typically produces, so treat them as indicative rather than measured.
Picture a Johannesburg law firm whose homepage attracts around 45 external dofollow backlinks from legal directories, news articles, and industry associations. The homepage would accumulate strong PageRank as a result. However, suppose the firm's key service page for "commercial litigation Johannesburg" has no external backlinks of its own and ranks poorly for that query.
By adding a prominent internal link from the homepage directly to the commercial litigation page, the firm would channel some of the homepage's accumulated link juice to that service page. If the homepage has 10 outbound links in its navigation and body, each receives roughly one tenth of the page's available PageRank to pass on. Adding a contextually relevant, prominent link to the commercial litigation page within the homepage's main content rather than in the footer would typically give that page a meaningful authority boost, which could plausibly contribute to improved rankings.
South African businesses can maximise link juice flow on their own sites through: reducing unnecessary outbound links that leak juice to external sites, consolidating thin or duplicate pages that split link equity across multiple URLs, ensuring category pages are linked from the homepage, and creating well-structured pillar content that receives links from many internal pages. When combined with a steady programme of external link building, these internal optimisations compound over time.
FAQ
Does adding more internal links to a page increase its link juice?
Internal links from strong pages on your site do pass link juice to the linked page. However, PageRank is divided among all outbound links on a page, so each additional link on a page slightly dilutes the juice passed per link. Point internal links from your highest-authority pages to the pages you most want to rank.
Can I sculpt link juice by using nofollow on some internal links?
Google no longer supports PageRank sculpting through nofollow internal links. When you nofollow an internal link, the PageRank that would have passed to it is lost rather than redistributed. For this reason, most SEO professionals avoid nofollowing internal links and instead manage authority distribution through site architecture.