Does internal linking really work in all directions?

What does internal link flow mean according to Google?

When Mueller talks about link flow, he refers to the transfer of SEO signals between pages within the same domain. Unlike external backlinks that bring authority from other sites, internal linking redistributes this authority within your own site.

The phrase "whether pointing to lower or higher-level pages" is crucial. It implies that a link from a deep page (e.g., /blog/article-123/) to the homepage transmits signals exactly like a downward link from the homepage to that same page.

Why does this statement contradict common beliefs?

For a long time, SEOs envisioned PageRank as a fluid that flows from the top down the hierarchy. This hierarchical view suggested that only downward links held weight, while upward links (breadcrumbs, footer links) were nearly useless.

Mueller dismisses this belief. Crawling and signal transmission do not follow a gravitational logic. A link is a link, period. Its position in the site hierarchy does not affect its ability to transmit signals, even if other factors (semantic context, position on the page, total number of links) obviously play a role.

What really determines the strength of an internal link?

If all links transmit signals regardless of their direction, what makes one internal link more powerful than another? The answer lies in several combined factors: the amount of authority held by the source page, the total number of outgoing links on that page (dilution), and the contextual relevance of the link.

A deep page that receives many external backlinks can become a more important source of signals than a poorly linked homepage. This is why some sites see their editorial content pages becoming authority redistribution hubs to other sections of the site.

• Link direction: no impact on the ability to transmit signals (upward = downward)
• Source page authority: determines the amount of signals available for redistribution
• Number of outgoing links: dilutes the signals transmitted by each individual link
• Context and anchor: influence the thematic relevance of the transmitted signals
• Position in HTML code: links at the top of a page may be crawled more quickly

Is this statement consistent with real-world observations?

Yes, and this explains some long-misunderstood phenomena. When a deep blog article goes viral and accumulates backlinks, there is often a boost effect on the entire site, not just on the page in question. This is not magic: this page redistributes its authority through its internal links, including those that point back to the homepage or categories.

Sites that structure their linking solely in a downward fashion (homepage → categories → products) miss massive opportunities. A well-performing product can become a signal relay to other related products, even if they are on the same hierarchy level or higher. The one-way pattern is a conceptual relic.

What nuances should be added to this statement?

Mueller does not say all links have the same final impact. He confirms that signals pass, but their quantity and effect depend on other variables. A link buried in a footer with 200 other links will transmit less than a unique contextual link in the middle of content, regardless of its direction.

Crawl speed also plays a role. Google prioritizes crawling pages it deems important (often those close to the root and frequently updated). A deep page that receives few visits from Googlebot will have a negligible effect in real-time, even if it points to the homepage, if the bot only visits it every two months. [To be verified]: Google has never communicated numerical data on the exact weighting of signals based on crawl frequency.

In what cases might this rule be problematic?

On large e-commerce or editorial sites with thousands of pages, the chaotic multiplication of upward links (each product links to the homepage through the logo, breadcrumb, menu, footer) can create a massive dilution of signals. If 10,000 pages all point to the homepage, it receives diluted signals from each.

Paradoxically, too many internal links pointing to the same page can hinder its ability to redistribute effectively. This is why some SEOs experiment with selective linking strategies, where only certain targeted pages receive links from strategic hubs, rather than a generalized uniform linking.

What concrete actions should I take regarding my internal linking?

The first action: map your high-authority pages, not just those at the top of the hierarchy. Use a crawler (Screaming Frog, Oncrawl) combined with backlink data (Ahrefs, Majestic) to identify the pages receiving the most external links. These are your real signal hubs, even if they are buried 4 clicks from the homepage.

Next, audit the outgoing links from these pages. Are they only pointing to related pages at the same level? Create strategic bridges to other sections of the site that need a boost. A viral blog article can legitimately point to a relevant product or category page, even if it is "higher" in the conceptual hierarchy.

What mistakes should be avoided in implementation?

Do not over-optimize internal link anchors to the point of creating a detectable pattern. Google may interpret systematic repetition of exact anchors as artificial stuffing, even internally. Vary the phrasing, use natural contextual anchors rather than dry keywords repeated mechanically.

Avoid turning your site into a chaotic spider web where each page links to 50 other pages without thematic logic. Linking should serve the user before serving SEO. A link that adds no value for the reader will likely be ignored or devalued by Google, regardless of its direction in the hierarchy.

How can I check that my linking is optimized?

Crawl your site and analyze the distribution of internal links. Are certain pages accumulating hundreds of incoming links even though they don’t need them (overlinked homepage)? Are other strategic pages orphaned or under-linked? Rebalance by removing unnecessary links and adding relevant contextual links.

Also monitor crawl behavior using the Search Console. If Googlebot rarely visits certain sections that are important, they are likely poorly integrated into the linking structure. Create shorter and more direct crawl paths from your frequently visited pages. Good linking is measured as much by the speed of discovering new pages as by their final ranking.

• Identify pages with strong external authority (backlinks) that can serve as internal relays
• Create contextual links from these hubs to strategic pages, regardless of their position in the hierarchy
• Audit and clean up unnecessary or redundant links that dilute signals (overloaded footers, excessive menus)
• Vary internal link anchors to avoid detectable over-optimization
• Measure impact through crawl frequency and positions on target pages
• Test thematic silo linking rather than rigid hierarchy