Googles Page Rank Update on October 27, 2007, was their third update during the month of October, and it has caused confusion, frustration and a lot of noise in the Internet Marketing Industry. The change resulted in lower Page Ranks for a number of sites, particularly sites that have significant interlinking occurring between them.
Although there are many ideas and theories circulating about the recent updates, a common thought is that the decreasing Page Ranks are due to Googles campaign against paid advertisements and links utilized on these sites. Duncan Riley suggests that the larger blog networks and other sites considered link farms, which produce numerous cross-links, are the primary targets of Googles crusade.
Riley seems to believe these updates will have serious ramifications for some blog sites. He writes, although traffic alone can and does sell ads on bigger sites, a drop from say PR7 to PR4 in one example makes the ad sell that much more difficult, particularly on blogs with little traffic. Id suggest that the Deadpool will soon see a number of new entrants.
Google resource Matt Cutts gave the official word on the updates to the Search Engine...