17 Ways Search Engines Judge the Value of a Link
Posted by randfish
It’s 9:30am and you’ve just started a pitch for a new SEO client. They’re the curious type – wanting to know how search engines rank pages, why the changes you’ll recommend will make an impact, where you learned to do SEO, and who you can list as good examples of your work. As you dive deeper into the requirements for the project, you arrive at the link building section. The client wants to know why link building matters so much. You pull up a chart of Search Engine Ranking Factors, noting the large role that links play in the ordering algorithms. They’re mollified, but have one last question:
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PageRank sculpting
People think about PageRank in lots of different ways. People have compared PageRank to a “random surfer” model in which PageRank is the probability that a random surfer clicking on links lands on a page. Other people think of the web as an link matrix in which the value at position (i,j) indicates the presence of links from page i to page j. In that case, PageRank corresponds to the principal eigenvector of that normalized link matrix.