PageRank (PR) is a calculation, famously invented by Google founders Larry Page and Sergey Brin, which evaluates the quality and quantity of links to a webpage to determine a relative score of that page’s importance and authority on a 0 to 10 scale.
how can backlinks help or hurtThe handful of PageRank 10 domains, including USA.gov, Twitter.com and Adobe Reader Download, have the highest volume of inbound links of any sites on the web.
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