Link factors include that portion of the Google algorithm that determines page importance, which in turn is primarily dependent on PageRank (PR) – the quantity and strength of links that point to your site . However, the concept of link quality is also an important factor, which is not part of the PageRank calculation. Strictly speaking, link quality is determined by keyword factors , which was the topic of the previous section of the book, but is listed here because of it’s close tie-in with your link exchange efforts.
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