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What is PageRank?
PageRank is a numeric value that represents how important
a page is on the web. Google figures that when one page
links to another page, it is effectively casting a vote
for the other page. The more votes that are cast for a
page, the more important the page must be. Also, the importance
of the page that is casting the vote determines how important
the vote itself is. Google calculates a page's importance
from the votes cast for it. How important each vote is
is taken into account when a page's PageRank is calculated.
PageRank is Google's way of deciding a page's importance.
It matters because it is one of the factors that determines
a page's ranking in the search results. It isn't the only
factor that Google uses to rank pages, but it is an important
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