Google's original algorithm doesn't work like it once did because they are lost in controversy over their webspam
I think we all understand how web spam works to a degree. Purveyors want to sell some ads so they put up content that the search engines will like. Perhaps they have a network of sites that do this and they put links between the sites to each other's content to help the chances and game the search engines.
But the original beauty of Google's search engine, which set it apart and differentiated it from the crowded field in the 90s, was the PageRank algorithm. The idea, as far as most people understand, was that web pages are ranked by the quality and quantity of links that are sent to them. PageRank, drawn, is where the colorful Google (GOOG) balls/logo come from (seen pictured at right).
Google describes PageRank:
PageRank reflects our view of the importance of web pages by considering more than 500 million variables and 2 billion terms. Pages that we believe are important pages receive a higher PageRank and are more likely to appear at the top of the search results. PageRank also considers the importance of each page that casts a vote, as votes from some pages are considered to have greater value, thus giving the linked page greater value. We have always taken a pragmatic approach to help improve search quality and create useful products, and our technology uses the collective intelligence of the web to determine a page's importance.
So how does all of this spam get through? No one links to spam...
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