PageRank, a term often bandied about in the world of SEO, is a fundamental concept introduced by Google to evaluate the importance of web pages. While Google PageRank is no longer a public-facing metric, it’s still hugely important, and understanding its principles and the tools available to interpret it can significantly enhance your SEO strategy.
PageRank is an algorithm developed by Google founders Larry Page and Sergey Brin at Stanford University to simplify how authoritative and trustworthy a site is on the Internet. It assigns a numerical value to each web page based on its authority and relevance. The idea is that important pages will likely receive more links from other websites.
Essentially, PageRank measures the quantity and quality of backlinks to a page to determine a rough estimate of its importance and influence. PageRank works on the principle that a page is considered important if it is linked to by other important pages. This recursive nature means that not all links are created equal; links from high-authority pages carry more weight.
While PageRank algorithm outputs are not the only metrics Google uses to order search results, it is one of the first and the best-known.
While PageRank was publicly visible through Google Toolbar until 2016, the specific values are no longer accessible. Google still uses the PageRank algorithm internally as part of its overall ranking process (which changes regularly), but it no longer discloses this data. Consequently, SEO professionals tend to rely on various third-party tools to interpret and estimate PageRank, as the algorithm is tricky. So yes, PageRank can be roughly measured, but not precisely.
While we no longer have access to PageRank scores, we know that it calculates the probability that a person randomly clicking on links will arrive at a particular page. Each page starts with an equal probability value, which gets adjusted through several iterations to reflect its true importance. Confusing, right? Well, here are the key takeaways before we get to the difficult part:
PageRank measures the importance of web pages based on incoming links
All pages start with the same initial value
The algorithm adjusts values over multiple iterations
Links from high-quality pages are more valuable
This means the PageRank of page u depends on the PageRank of each page v linking to u, divided by the number of outbound links from v.
If you’re still feeling confused - you’re not alone. Take a look at the page rank Wikipedia page for a more in-depth breakdown of the algorithm.
Although we can’t measure PageRank directly, several tools provide valuable insights into a page’s authority and link profile, helping us approximate its importance. Here are some of the main tools we rely on at Kaweb:
Domain Authority (DA) and Page Authority (PA) are metrics developed by Moz to predict how well a website or a specific page will rank on search engine result pages (SERPs). These scores range from 1 to 100, with higher scores indicating greater ability to rank.
DA evaluates the overall strength of a domain.
PA focuses on the ranking strength of individual pages.
Moz’s metrics consider link counts, MozRank, MozTrust, and other factors, providing a robust estimate of a site's ranking potential.
Ahrefs offers Domain Rating (DR) and URL Rating (UR) as metrics to gauge the strength of a website’s backlink profile.
DR measures the overall strength of a website’s backlink profile on a scale from 1 to 100.
UR assesses the strength of a specific page’s backlink profile.
These metrics consider the number and quality of backlinks and the internal structure of the site’s link network.
Majestic provides Trust Flow (TF) and Citation Flow (CF) to help interpret link quality and quantity.
TF measures the quality of links pointing to a site, indicating trustworthiness.
CF evaluates the quantity of backlinks, reflecting the link volume.
A high Trust Flow relative to Citation Flow suggests a high-quality backlink profile.
Authority Score by SEMrush combines data from multiple metrics to provide a single score that reflects a domain’s overall authority.
This score considers backlink quality, website traffic, and other SEO metrics, offering a comprehensive view of a site's potential to rank.
The primary goal of any search engine is to help users find the information they need online by using keywords or phrases. Google's PageRank resulted in more correct answers, more often, making it a significant factor behind Google's success.
Google wasn’t the first search engine, but it stood out because Google Search Engine delivered higher-quality search result rankings than its competitors. This success was largely due to the PageRank algorithm, which is perhaps why it is still considered one of the top SEO ranking factors among the 200+ others that Google uses to determine site rankings.
Improve Internal Links: Strengthen your internal linking strategy by ensuring that your most important pages are easily accessible and well-linked within your site. This helps distribute PageRank across your pages more effectively.
Build High-Quality Backlinks: Acquiring high-quality backlinks is crucial. Read our recent link-building blog to learn our best techniques for acquiring great external links.
Broken Link Building: Identify broken links on authoritative websites in your niche and suggest your content as a replacement. This helps the site owner fix an issue while earning you a valuable backlink.
Guest Blogging: Write high-quality, relevant content for reputable sites in your industry. Guest blogging allows you to showcase your expertise and gain backlinks from established platforms.
Digital PR: Respond to requests from journalists and bloggers seeking expert opinions or information. If your contribution is used, you typically receive a backlink to your site. Find out more about digital PR in our recent blog post.
Despite the evolution and increased complexity of Google's algorithm since PageRank was first introduced, the fundamental principles of PageRank still form the core factor for where your website ranks in the SERPs.
While we can’t measure PageRank value directly anymore, understanding its principles and using the right tools to approximate it can give us valuable insights into a website’s authority and ranking potential. Tools like the ones outlined above help interpret the underlying factors contributing to PageRank. So, make informed decisions to improve your site’s search engine rankings and overall online visibility, and use the principles of PageRank to drive success.
At Kaweb, we know that a full arsenal of tools is the best way to reach the top of the SERPs and stay there through any and all of Google’s algorithm changes. So, if you get stumped after the part where you make sure there are pages linking to other pages, give us a call at +44 (0)1543 414 564. We handle everything, from technical SEO to hosting and CRO optimisation.
