How Does PageRank Work?
- Google interprets a link from page A to page B as a vote, by page A, for page B. Google looks not only at the sheer volume of votes; among 100 other aspects it also analyzes the page that casts the vote. However, these aspects don’t count, when PageRank is calculated.
- PageRank is based on incoming links, but not just on the number of them - relevance and quality are important (in terms of the PageRank of sites, which link to a given site).
- # If you had a web page with a PR8 and had 1 link on it, the site linked to would get a fair amount of PR value. But, if you had 100 links on that page, each individual link would only get a fraction of the value.
- PageRank values don’t range from 0 to 10. PageRank is a floating-point number.
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Impact on Google PageRank
- High Page Rank doesn’t mean high search ranking.
- Wikipedia links don’t improve PageRank automatically (update: but pages which extract information from Wikipedia might improve PageRank).
- Efficient internal onsite linking has an impact on PageRank.
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more: http://www.smashingmagazine.com/2007/06/05/google-pagerank-what-do-we-re...
