Search Engine Optimizer Aaron Wall put up an extensive, multi-angled analysis of the worth of a top Google ranking.

Google Ranking and Pagerank are probably the most important algorithms ever developed for the Web. With billions of existing pages and millions of pages generated every day, the search issue in the Web is more complex than you probably think it is. PageRank, only one of hundreds of factors used by Google to determine best search results, helps to keep our search clean and efficient.