This tools allows you check the pagerank of any page you want for free. PageRank is a numeric value that Google uses to rank websites by importance on the internet. Here is the Google way of explaining PageRank:
PageRank relies on the uniquely democratic nature of the web by using its vast link structure as an indicator of an individual page's value. Google interprets a link from page A to page B as a vote, by page A, for page B. But Google looks at more than the sheer volume of votes, or links a page receives; it also analyzes the page that casts the vote. Votes cast by pages that are themselves "important" weigh more heavily and help to make other pages "important."
Using few words, Google PageRank a is very important indicator of the importance of your website
* The name "PageRank" is a trademark of Google. Google has exclusive license rights on Pagerank algorithm
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