The most important ranking factor for the big money keywords is Site Architecture of the Domain.
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Google search ranking factors can be divided into two categories.
Page Rank factors are not specific to any keyword and measure general page quality and popularity.
Page Reputation factors measure the quantity and quality of information related to a specific keyword.
This is a test to see if I can improve the rank for the SmartSound.com Royalty Free Documentary Music page with this link. Documentary film makers often use Royalty Free Music to score Documentaries.