PageRank
PageRank is an algorithm developed by Google co-founders Larry Page and Sergey Brin in 1997 that measures the relative importance of a webpage by analyzing the quantity and quality of links pointing to it.
PageRank is an algorithm developed by Google co-founders Larry Page and Sergey Brin in 1997 that measures the relative importance of a webpage by analyzing the quantity and quality of links pointing to it.
Why It Matters
PageRank is the foundational concept behind Google Search and modern SEO. The idea that "links are votes" established backlinks as a core ranking signal and forms the theoretical basis of off-page SEO. Although Google stopped publishing public PageRank scores in 2016, internal API documents leaked in 2024 confirmed that multiple PageRank variants (RawPageRank, PageRank2, PageRank_NS) remain actively used in Google's ranking system.
How It Works
The core principle is straightforward: the more links a page receives from other pages, the more important it is considered. However, not all links carry equal weight.
- Link quality: A link from a page with high PageRank passes more value than one from a low-authority page
- Link distribution: The more outbound links a page has, the less value each individual link passes
- Internal link propagation: PageRank flows through internal links too. Link value received by Page A from external sources partially transfers to Page B via internal links
The value transferred through links is commonly called "link juice" or "link equity."
PageRank and Modern SEO
Since Google no longer publicly shares PageRank scores, SEO tools have developed proxy metrics:
| Tool | Metric | Description |
|---|---|---|
| Ahrefs | Domain Rating (DR) | Rates backlink profile strength on a 0–100 scale |
| Semrush | Authority Score | Combines backlinks, traffic, and natural language signals |
These metrics are not identical to PageRank but provide practical estimates of backlink profile strength.
Common Misconceptions
- "PageRank is dead" — Only the public score was removed; the algorithm still operates internally
- "Only link count matters" — Link quality (source authority, relevance) outweighs quantity
- "Internal links don't affect PageRank" — Internal links do propagate PageRank, making strategic internal linking important
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