Google updates algorithm, targeting content farms

We saw this one coming a while back, and now it's live: Google has made changes to their algorithm that will reduce the ranking of so-called "content farms" like Demand Media or eHow, who create all those wonderful articles like "How to Get Pregnant" (seriously). These articles, though marginally informative, don't really exist to provide unique, useful information; they exist to sell ads on those very pages, and that advertising is big business - Demand Media's IPO was valued at more than one billion dollars.

It remains to be seen exactly how content farm pages will suffer in ranking. Demand Media and other large-scale content providers have been anticipating this change for quite a while, so I expect they're already attempting to work around it. But, there's no denying that web users have staged something of a revolt against low-quality, high-volume content creators, and Google had no choice if it wanted to be perceived as delivering good search results.

The twist? Google, as the largest online ad network in the world, makes millions off the ads that are shown on these sites. Reducing the ranking of high-volume content farm pages will undoubtedly impact Google's ad revenue. No one has any idea how much impact this will have on ranking or revenue, but if you're interested in an in-depth overview of the change, Danny Sullivan over at Search Engine Land has put together a thorough, detailed analysis.