Your most important pages are probably the least linked.

PageRank flow

PageRank - Google's original measure of page authority, still a core ranking signal - flows through links. Every page on your site starts with some PageRank (from external links pointing to it, or from its position in the site hierarchy) and distributes a portion of that to every page it links to. A page linked from your homepage, which has the highest PageRank on most sites, receives a meaningful authority boost. A page linked from nothing receives none.

This means your internal linking decisions are authority allocation decisions. Every time you add or remove an internal link, you're redirecting PageRank flow. Most teams don't think about it that way - they think about it as navigation. But the PageRank model doesn't care about navigation intent: it follows the links.

Crawl signals

Internal links are how Googlebot discovers pages. A page with no inbound internal links from indexed pages is unlikely to be crawled frequently, regardless of what your sitemap says. The crawl queue prioritises pages that are well-linked from authoritative pages. If a new piece of content sits orphaned, Google may take weeks to find it and longer to index it.

Topical clustering

When pages on related topics link to each other with descriptive anchor text, Google's systems understand the topical relationship. A pillar page on "B2B SaaS pricing" that links to supporting posts on "value-based pricing models," "pricing page conversion," and "competitive pricing for SaaS" signals a coherent topic cluster. Each page in the cluster benefits from the topical authority established by the group.

In B2B, internal linking has a second dimension beyond PageRank: it shapes the path a buyer takes through your site. A buyer who lands on a problem-awareness blog post should be linked forward to the evaluation-stage content, not sideways to another awareness post. Most B2B sites do the sideways link by default because "related posts" widgets sort by category or recency.

Map your content to four rough stages: awareness (they have a problem), education (they understand the solution category), evaluation (they're comparing options), decision (they're ready to talk). Then audit your internal links with the question: does this link move the buyer forward in their journey, or sideways within the same stage?

Pillar-to-cluster links

Your highest-authority pages - typically pillar pages on core topics - should link explicitly to every supporting piece in their cluster. This distributes PageRank from the high-authority pillar to the cluster pages and establishes the topical relationship. Most B2B sites have pillar pages that link to nothing in their cluster because they were written as standalone sales assets. That's a wasted authority flow opportunity.

Stage-to-stage links

Within each topic cluster, every piece should have at least one link that moves the buyer forward in the journey. A "what is X" explainer should link to a "how to implement X" guide. That guide should link to a "how we do X for clients" case study. The chain creates a path from discovery to consideration. Without it, buyers leave and Google sees isolated pages rather than a coherent content system.

Entity-to-entity links

When you mention a concept, person, or product that you have dedicated content about, link to it. This is the basic Wikipedia-style linking principle. It signals to Google that you've covered these topics in depth, strengthens entity relationships, and keeps buyers engaged with the full scope of your expertise. It also benefits AI search visibility: models following links to understand a brand's topical territory will find a richer footprint on a well-linked site than a siloed one.

Orphaned pages

An orphaned page has no inbound internal links from other indexed pages. It exists in your CMS and your sitemap, but Googlebot finds it only if Google happens to discover it from an external link. The fix is straightforward: identify orphaned pages, decide whether they're worth keeping, and if so, add contextually relevant internal links from pages that already rank. Three to five quality inbound links from related content will significantly improve crawl frequency and PageRank flow.

Flat architecture and navigation over-linking

Navigation menus that link to hundreds of pages dilute PageRank by distributing it evenly rather than intentionally. The homepage's PageRank gets split across every navigation destination. The pages that most deserve authority - your highest-converting product pages, your most important pillar content - receive the same weight as every other linked destination. Keep navigation links to genuinely important pages, and use in-content links for the authority-flow work.

Generic anchor text

Anchor text is a topical signal. "Click here," "read more," and "learn more" tell Google nothing about the destination page's content. Descriptive anchor text - "how internal linking affects crawl budget" rather than "read more" - signals relevance and contributes to topical authority. It doesn't need to be keyword-stuffed; it needs to describe what the linked page is actually about.

You don't need a specialist tool to run a basic internal link audit. Here's the three-step process I use:

1. Export your pages and their inbound internal link counts. Screaming Frog's free version (up to 500 URLs) crawls the site and shows inbound link counts per page. For larger sites, a paid tier or Ahrefs' site audit gives the same data. Sort by inbound links ascending. Every page with zero inbound internal links is an orphan - assess each one: kill it, merge it, or link to it.
2. Map your highest-value pages against their internal link situation. Your commercially important pages - product pages, pricing, key landing pages - should be among the most internally linked pages on the site, second only to the homepage. If they're not, find relevant blog posts and guides that can contextually link to them and add the links.
3. Identify your highest-PageRank pages and audit where they link. Use Ahrefs or a similar tool to find your pages with the highest external link equity. Then check where those pages link internally. If they link to low-priority pages while high-priority pages go un-linked, redirect the flow.

One afternoon with Screaming Frog and a spreadsheet will surface the 20% of fixes that address 80% of the internal link opportunity on most B2B sites.