Some sites try to link to many other high authority sites in
order to help their rankings, but that does not help at all. Google uses
PageRank to decide how your site will rank, and that algorithm is based on how
useful your site is to others, and as such it will only look at how many other
people link to you. Whether you link back to them is of no importance.
Otherwise, any site could raise to the top simply by linking to millions of
sites, which is not the case.
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