SEO Glossary
What is SEO, and how does it work?
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PageRank is a mathematical algorithm used by Google to performs link analysis. PageRank assigns numerical weight to each element of hyperlinked documents and measures the importance of each of those documents. PageRank measures the number of pages that link to a specific page.

It was developed at Stanford University by Larry Page and Sergey Brin (co-founders of Google), as a part of a research to develop a new search engine. That is why the patent of PageRank belonged to the University. However, Google paid the university 1.8 Million shares to get exclusive rights to the patent. Stanford later sold the shares for $336 Million.

Since PageRank has been introduced, many webmasters have tried to manipulate the search engines results by selling or buying high links that pass PageRank. This has been countered by a number of Google Algorithm updates and the act of selling links has been labeled wrong.

* According to PageRank, the most popular pages have a PageRank 10, and the lest popular have PageRank 0.

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