Google is on the hunt for content farms - sites with shallow or low quality content - announcing the release of an experimental Chrome extension for people to block sites from appearing in their Web search results.
In addition to blocking the site from appearing, the extension also sends the blocked site's information to Google. Should Google opt to use the feedback as a ranking signal in the future (since they will have the ability to analyze that feedback individually and in aggregate), those responsible for SEO are going to want to keep an eye on the impact.
When users block a site with the Chrome extension, they will not see the results from that domain again. Site blocks can be revoked at the bottom of the SERPs, and lists of the blocked sites can be edited.
The extension is currently available in English, French, German, Italian, Portuguese, Russian, Spanish and Turkish.