Google Goes After AdSense Farms With Update

“Google said Thursday that it had made a major change to its algorithm in an effort to improve the rankings of high-quality Web sites in its search results, and to reduce the visibility of low-quality sites. While the company did not say so explicitly, the change appears to be directed in part at so-called content farms like eHow and Answerbag, which generate articles based on popular search queries so they will rise to the top of the rankings and attract clicks.”