What Is PageRank? How Google’s Link System Works

PageRank is a system for estimating the relative importance of a web page based on links from other pages. It began with a simple insight: a link can act like a vote, but a vote from an important page should carry more weight than a vote from an isolated one.

Google's ranking systems have changed enormously since Larry Page and Sergey Brin described the original approach. PageRank is no longer a public score you can check in a browser toolbar. It remains useful as a mental model for understanding why links, internal navigation, and page-level authority matter.

The original PageRank idea#

The original model treated the web as a graph. Pages were nodes; links were edges. A page received PageRank from pages that linked to it. The amount passed through a link depended partly on the linking page's own PageRank and how many outbound links it contained.

A simplified formula included a damping factor, representing the probability that a person following links would eventually jump to another page. The mathematics produced a recursive system: important pages were those linked by other important pages.

The original Stanford paper, The Anatomy of a Large-Scale Hypertextual Web Search Engine, explains the research context. Modern Google ranking is far more complex, but links remain one way search systems discover pages and understand relationships.

PageRank is page-level#

This point prevents a common misunderstanding. PageRank evaluates pages, not a domain as a single unit.

A strong domain can have deeply buried pages with few internal or external links. A smaller website can have one exceptionally well-cited guide. Domain-level SEO metrics summarize a broader backlink profile; PageRank's original logic flows through individual links between individual pages.

That is one reason Domain Rating and PageRank are not the same thing.

What happened to the public score#

Google once displayed a simplified PageRank value in its Toolbar. The visible number encouraged manipulation and became stale. Google stopped publicly updating it and ultimately removed the Toolbar score.

That does not mean links stopped mattering. It means website owners can no longer see Google's internal PageRank values. Third-party tools created their own link metrics, including Ahrefs' URL Rating and Domain Rating, but none is a direct window into Google's systems.

How links distribute importance#

The useful PageRank model has several practical implications.

External links can introduce authority#

When another page links to a useful resource, it creates a path for discovery and potentially transfers link equity. The quality and context of the source page matter. A relevant editorial citation is fundamentally different from a sitewide link on an unrelated page.

Internal links direct attention#

Internal links help crawlers find pages and show which pages a site considers important. A guide that is linked from the homepage, a category hub, and related articles has a stronger internal path than an orphaned post.

Google's link best practices recommend real anchor elements, descriptive anchor text, and at least one internal link to every page a publisher cares about.

Outbound links do not empty a page#

The idea that linking to useful sources inherently harms a page is an oversimplification. Links are part of how the web communicates context and evidence. Do not avoid citations merely to "hoard" authority. Link where the source improves the reader's understanding.

PageRank is not the whole ranking system#

Even a page with strong links can fail to rank for a query if it does not answer the query, is inaccessible, duplicates another page, or provides a poor experience. Google uses many systems and signals. PageRank helps explain link-based importance, not every ranking decision.

That distinction matters in link building. A founder should not pursue any page merely because it appears powerful. A good link should also be relevant, accurate, durable, and useful to the audience who sees it.

Internal PageRank for a small site#

Founders can apply the model without calculating a score:

1. Choose a small number of real topic hubs.
2. Link each new article from its hub.
3. Link supporting articles back to the pillar guide.
4. Use descriptive anchors that explain the destination.
5. Fix broken internal links and redirect retired URLs to a relevant replacement.
6. Keep important pages within a reasonable number of clicks from primary navigation.

Mydentify's article library follows that approach. The link-building pillar connects to focused explanations of DR, link attributes, and directory backlinks. The directory hub connects to instructional guides that help founders use the data.

PageRank is best understood as a durable principle: pages become more discoverable and important when the web around them supplies meaningful paths. The public score is gone. The need for clear, relevant links is not.