PageRank is Google’s original algorithm for measuring the importance and authority of web pages based on the quantity and quality of links pointing to them. Named after Google co-founder Larry Page, it’s the foundational concept behind how Google evaluates which pages deserve to rank in search results. While Google’s algorithm has grown into a far more complex system over the years, PageRank remains one of its core signals. Understanding it helps you understand why backlinks matter and how search authority flows across the web.

How PageRank Works

The basic premise is simple: a page that receives many links from other pages is treated as more authoritative. But not all links carry equal weight. A link from a highly authoritative page passes more PageRank than a link from a low-authority page. PageRank flows through links like water through pipes: pages with many high-quality inbound links accumulate authority, and when those pages link out, they pass some of that authority to the pages they link to.

Internal Links and PageRank Flow

PageRank doesn’t only flow from external sites. Internal links, the links between pages on your own site, distribute authority across your domain. A well-structured internal linking strategy ensures that your most important pages receive authority from other pages on your site. This is why backlink strategy and internal linking strategy should be built together: earn authority from outside, then distribute it intelligently within your site.

PageRank vs. Domain Authority

Google no longer publicly displays PageRank scores, which led to the rise of third-party metrics like Moz’s Domain Authority and Ahrefs’ Domain Rating as proxies. These aren’t the same as PageRank but they correlate with similar signals. Google’s internal PageRank calculations continue to influence rankings; they’re just no longer visible to website owners directly.

Practical Implications for Your Website

For entrepreneurs building websites, the PageRank concept translates into concrete actions. Earn quality backlinks from reputable sites. Build a logical internal linking structure so authority flows to your most valuable pages. Avoid thin or duplicate content that dilutes your site’s overall authority. And prioritize SEO fundamentals that align with what Google has always rewarded: relevance, authority, and trust.

The Bottom Line

PageRank is the conceptual backbone of how search engines assign authority. Even though Google no longer publishes the score, the principles it introduced still drive how links influence rankings. Build quality backlinks, link intelligently within your site, and understand that authority is earned and flows. That understanding is the foundation of any serious SEO strategy.