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Google PageRank Explained: What It Is, How It Works, Factors That Impact It, and How to Improve Your PageRank

August 17, 2025

Illustration of Google PageRank explained with web pages linked by arrows, showing how authority flows between pages with a PageRank score.
Google PageRank visualized: how links between web pages pass authority and influence search rankings

What is Google PageRank?

PageRank is the original formula Google used to measure the importance of web pages. It was created in the late 1990s by Larry Page and Sergey Brin, who wanted a way to judge the value of a page beyond just the words on it. Instead of only looking at content, PageRank considered how many other websites linked to a page and how important those websites were.

This approach helped separate useful pages from less reliable ones. By evaluating the quality of links, Google could deliver better results than competitors at the time. Even though PageRank as a visible score has disappeared, the idea behind it still shapes how Google measures authority today.

What is PageRank in SEO?

In SEO, PageRank refers to how link authority flows from one page to another. Every backlink pointing to your site passes some value, and that value influences how strong Google thinks your page is. A page with more high-quality links will generally rank higher than a page without them.

SEO professionals still talk about PageRank even though the actual score is hidden. They use it as shorthand for link authority and the influence backlinks have on rankings. It is a reminder that links are one of the most important signals in search optimisation.

What is a PageRank for a webpage?

A PageRank for a webpage is essentially a measure of how important that page is compared to others on the internet. If lots of trusted sites link to it, its PageRank is higher. If it has very few or no links, its PageRank is low.

Each page on your website has its own PageRank. It is not just about the domain as a whole. This means that a blog post can have strong PageRank if it earns links, even if the rest of your site is smaller or newer.

Why is PageRank important?

PageRank is important because it influences how high your site appears in search results. While Google uses many ranking factors, backlinks remain one of the most powerful. If you ignore PageRank, you are ignoring the way Google distributes authority between pages.

A strong PageRank makes it easier for your content to compete in search. Even new pages on a site with strong overall authority tend to rank faster because they benefit from the existing flow of PageRank.

When was PageRank invented and who invented the PageRank algorithm?

PageRank was invented in 1996 by Larry Page and Sergey Brin while they were PhD students at Stanford University. The name itself comes from Larry Page’s surname. They developed the algorithm to improve how search engines ranked results, and it became the foundation of Google when it launched in 1998.

The timing was crucial. At that point, other search engines often ranked sites poorly, showing irrelevant results. Page and Brin’s formula was revolutionary because it ranked pages based on trust signals from the wider web rather than just keywords.

How Does the PageRank Algorithm Work?

The PageRank algorithm works by treating links as votes of confidence. When one page links to another, it is like saying, “this page has value.” But not all votes are equal. A link from a highly trusted site passes more weight than a link from a small or low-quality site.

Over time, the algorithm assigns each page a probability score based on how likely it is that a user randomly clicking links would arrive at that page. Pages with more high-quality inbound links get higher scores, which makes them rank better in search results.

What is the PageRank algorithm?

The PageRank algorithm is a mathematical formula that calculates the importance of each page based on link structure. It spreads value from one page to another, dividing authority among the links it points to.

If a high-value page links to yours, a portion of its authority flows to your page. The more high-value links you collect, the more authority you build.

How does Google’s PageRank system work?

Google’s PageRank system worked by crawling the web, recording links, and calculating how authority should flow. The algorithm passed value forward through links and updated scores as it crawled new pages.

Although Google now has hundreds of ranking signals, the system of link authority remains. It is less obvious than it once was, but the backbone of rankings is still based on how trusted your page is through links.

How does the PageRank algorithm work?

The PageRank algorithm works like a vote-counting system with weight. Imagine that every page on the internet has a certain amount of importance. When that page links out, it gives away part of its importance to other pages. Pages that receive more of these high-quality votes climb higher in Google’s search results.

The actual math is more complex, involving probability and iterative calculations, but the principle is straightforward. Links equal votes, and better votes count more.

How was PageRank calculated originally?

Originally, PageRank was calculated using a probability formula that assumed a random user clicked through links endlessly. Each time the user clicked a link, part of the authority from the original page flowed to the destination page.

The process involved multiple rounds of calculation until the scores stabilized. Pages with many high-quality inbound links ended up with higher scores, which pushed them higher in rankings.

How is PageRank calculated today?

Today, PageRank is still based on link value, but it has been refined. Google no longer relies solely on the original formula. It uses variations that account for spam, link quality, context, and user behavior.

While the calculation is more advanced, the underlying idea remains the same. A page with strong links carries more authority, and that authority affects where it ranks in search results.

How did Google’s PageRank algorithm revolutionize search engines?

Before PageRank, search engines often ranked results based only on keyword matching. This led to irrelevant pages showing up at the top. PageRank changed that by rewarding authority and trust through backlinks.

This revolutionized search by making results more useful. It allowed Google to quickly overtake other engines, as users found its results more accurate. The shift toward link-based ranking is what built Google into the dominant force it is today.

Factors That Impact Google PageRank

PageRank is influenced by several factors. Backlinks are the most obvious, but not just any backlink will do. Links from high-authority, relevant websites matter far more than random or spammy ones.

The structure of your site also plays a role. Internal links help spread PageRank between your own pages. If important pages are buried deep within your site, they may not get enough authority to rank well. This is why click depth has a direct impact on PageRank. Pages closer to your homepage or linked often are stronger.

The text used in links, known as anchor text, adds further impact. Descriptive, relevant anchor text gives Google a clearer picture of what your page is about. When used naturally, this strengthens the connection between your content and the keywords you want to rank for.

Which of the following factors have an impact on the Google PageRank?

The factors that impact PageRank include the number of backlinks, the authority of the sites providing those backlinks, the relevance of the linking content, the internal linking structure of your site, and the click depth of individual pages.

Another factor is how evenly link authority flows across your site. If your site has orphan pages with no internal links, they receive little to no PageRank. Balancing your internal structure ensures that authority reaches all the important parts of your website.

Content quality indirectly impacts PageRank too. Without strong content, you are less likely to attract high-quality backlinks. Google measures authority through links, but those links only come if your content is worth referencing.

What is the relationship of click depth to PageRank?

Click depth is the number of clicks it takes to reach a page from your homepage. The deeper a page is buried, the less authority it receives. A page that requires five clicks to access will usually have weaker PageRank compared to a page that is linked directly from the homepage.

Good site architecture ensures that key pages remain within two or three clicks from the homepage. This makes it easier for both users and search engines to find them, and it allows more PageRank to flow to them.

Backlinks and PageRank

Backlinks are the backbone of PageRank. Each backlink is like a vote, but the quality of that vote is what matters most. A single backlink from a trusted, authoritative site in your industry can outweigh hundreds of weak or irrelevant ones.

If your PageRank feels like it is zero, it may mean that you do not have enough quality backlinks pointing to your site. It can also mean that your site is new and has not yet had time to build authority. Over time, as you earn backlinks, your PageRank improves and your pages begin to rank higher.

There is no magic number of backlinks required. The number varies depending on competition. In a low-competition niche, a handful of strong backlinks may be enough. In a highly competitive space, hundreds may be needed. The key is always quality over quantity.

How to Check PageRank

Google removed public PageRank scores years ago, which means you cannot directly check your PageRank anymore. People still ask how to check PageRank, but the answer is that you cannot see the exact figure.

What you can do is use third-party tools like Ahrefs, Moz, or Semrush. These tools provide metrics such as Domain Rating or Domain Authority that approximate how strong your backlink profile is. While these are not the same as PageRank, they give a benchmark for comparison against competitors.

Another way to judge PageRank strength is by observing how easily your pages rank. If you can publish a new page and see it rank quickly for medium-difficulty keywords, your site likely has strong PageRank flowing through it.

How to Improve and Increase Your PageRank

Improving PageRank comes down to three main areas. First is building high-quality backlinks. This includes guest posting on relevant blogs, earning press mentions, and creating shareable resources that others want to link to.

Second is strengthening your internal linking structure. Make sure your important pages are linked from multiple areas of your site. This distributes authority and helps Google see them as central parts of your website.

Third is creating strong content. No backlink strategy will succeed without content that is worth linking to. Detailed guides, original research, or tools that solve problems are the types of content that naturally earn links and improve your PageRank.

Conclusion: PageRank and SEO Today

PageRank is not visible anymore, but it is still part of Google’s ranking system. It remains one of the signals that influence where your site shows up in results. Backlinks and site structure continue to matter, even if they are not the only ranking factors.

Modern SEO requires balancing content quality, user experience, and technical performance along with authority. PageRank ties many of these elements together. By focusing on valuable content and acquiring strong backlinks, you continue to benefit from the core principles of PageRank that helped shape search engines in the first place.