New Chrome Extension Feeds Back Reports Of Content Farms and User Marked Spam to Google

We’ve been exploring different algorithms to detect content farms, which are sites with shallow or low-quality content. One of the signals we’re exploring is explicit feedback from users.To that end, today we’re launching an early, experimental Chrome extension so people can block sites from their web search results. If installed, the extension also sends blocked site information to Google, and we will study the resulting feedback and explore using it as a potential ranking signal for our search results.