Google PageRank: Complete Guide

Google PageRank is the original algorithm that made Google, well, Google: a way to score a page's importance by looking at the links pointing to it. The public score is long gone, but the idea still runs inside Google's ranking system. This guide explains how it works, what happened to it, and why link authority still matters today.

What PageRank measures

PageRank assigns a numerical weight to a web page to estimate its relative importance. The core insight, as Google's own description puts it, is that the system "works by counting the number and quality of links to a page to determine a rough estimate of how important the website is."

The word "quality" is doing heavy lifting there. PageRank is not a simple link count. A single link from a widely respected page can outweigh dozens of links from obscure ones, because importance flows through the link graph. That is why link building has always been about earning the right links, not the most links.

How the algorithm works

PageRank rests on two ideas that are easy to grasp without any maths.

• Links as votes. Every hyperlink to a page counts as an endorsement. Links from pages that are themselves important carry more weight, so influence concentrates around trusted pages.
• The random surfer and the damping factor. Imagine someone clicking links at random forever. The damping factor, typically set to 0.85, is the probability they keep clicking rather than jumping to a random new page. It stops rank from getting trapped and endlessly circulating inside tight link loops.

The result is a score that reflects how likely that random surfer is to land on any given page. Pages that many well-connected pages point to accumulate a higher score. This link-graph thinking is the ancestor of modern authority metrics, and it underpins why our backlinks guide treats link quality as central.

A short history

PageRank came out of a Stanford research project in 1996, developed by Larry Page and Sergey Brin. It was named partly after Larry Page, and it gave their new search engine a decisive edge: results ordered by a genuine measure of importance rather than just keyword matching. That advantage is a large part of why Google overtook the search engines that came before it.

For years, Google exposed a simplified 0 to 10 PageRank score through the Google Toolbar, and an entire industry obsessed over it. That public number is what most people picture when they hear "PageRank," and it is also the part that no longer exists.

Is PageRank dead? What actually happened

The public score is dead. The algorithm is not. Two facts matter here:

• The Toolbar PageRank score was last updated in November 2013 and was officially discontinued on 15 April 2016. After that date, there was no public number at all.
• Google has confirmed that PageRank continues to operate as part of its ranking system, as one signal among a great many. Google has long described PageRank as just one of over 200 factors.

So when someone says "PageRank is obsolete," they are half right. The green toolbar bar is gone and should be ignored. The underlying principle, that links carry authority, is very much alive inside how Google search ranking works today.

What replaced the public score

Because Google no longer publishes a PageRank number, the SEO industry built its own approximations of link authority. These are third-party estimates, not Google data, and you should read them that way:

• Moz Domain Authority and Page Authority: Moz's 0 to 100 predictive scores for a domain and a page.
• Ahrefs Domain Rating and URL Rating: Ahrefs' own link-strength metrics.
• Majestic Trust Flow and Citation Flow: separate scores for link quality and quantity.

Each vendor uses a different link index and formula, so their numbers do not match each other and none is Google's real internal figure. Use them for relative comparison, tracking your trend versus competitors, rather than as a target to hit. Our domain authority checker guide explains how to read these metrics without over-trusting them.

How to build PageRank-style authority today

Since links still transfer authority, the practical work is earning good ones, honestly.

1. Create genuinely link-worthy content. Original research, useful tools, and thorough guides attract links naturally.
2. Earn relevant, editorial links. A link from a respected site in your field is worth far more than volume from unrelated ones.
3. Use internal links well. PageRank flows inside your own site too. Linking from strong pages to important ones helps distribute authority.
4. Avoid manipulation. Buying links or joining link schemes violates Google's guidelines and risks a penalty that outlasts any short-term gain.

For a full methodology, see our link building guide, which turns these principles into a repeatable process.

Frequently asked questions

Does Google still use PageRank?

Yes, internally. Google retired the public Toolbar PageRank score in 2016, but it has confirmed that PageRank still operates as part of its ranking system. It is one signal among hundreds, so links continue to influence rankings even though you can no longer see a public score.

Who invented PageRank and when?

Larry Page and Sergey Brin developed PageRank at Stanford University in 1996 as part of their search engine research. It gave their early search engine a major advantage by ordering results according to a real measure of page importance rather than keyword matching alone.

When did Google remove the PageRank score?

The public Toolbar PageRank was last updated in November 2013 and was officially discontinued on 15 April 2016. Since then there has been no public PageRank number, even though the underlying algorithm keeps running inside Google's systems.

What is the damping factor in PageRank?

The damping factor, usually set to 0.85, represents the probability that a random web surfer keeps clicking links rather than jumping to a random page. It prevents rank from becoming trapped in closed loops of links and keeps the calculation stable.

How can I check my authority now that PageRank is gone?

Use third-party estimates such as Moz Domain Authority, Ahrefs Domain Rating, or Majestic Trust Flow. These are approximations built on each vendor's own link index, not Google's real figure, so use them to compare relative strength and track trends rather than as an exact score.