Page rank is lightly called a number or rank that is assigned by Google to all website they are not really useful to improved ranking in search engine but in SEO fields its really good to build high PR links to get good page rank for our site. I have got such information from matt cutts blog about page rank must read once
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Well asked, Matt Crouch; I’m not sure if I’ve given the official word on a PageRank export before. It’s not a big event here at Google. Frankly, I didn’t even know we’d done our 3-4 month-ish push of this data. When I saw people talking about it online, I went to check and see whether it was a real push or not. In the past few months, people have noticed when an engineer grabs an obscure data center and tinkers around with things like backlinks or info: queries (e.g. when “Update Pluto” got downgraded because it was just an engineer tinkering at one data center). So I figured I’d let people know that this was a real PageRank export and not just one person doing something.
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