You can use the News Activity service by logging into your Yahoo account and visiting the Yahoo News page. From there you can log into your Facebook account and click, “Add to Timeline,” and your Facebook friends will appear in a facebar near the top of the Yahoo News page. When you place your mouse cursor over the avatar of your friends, you will be presented with a list of links for recent news articles they have read.
The assumption behind this feature is that your and your friends share similar interests and views, and thus they can be useful sources for helping you find relevant news content to read. According to Techcrunch.com, “Yahoo News says that 80% of its readers are already on Facebook and its news content is among the most shared on Facebook, so the integration makes sense.”
The Yahoo News Activity integration is powered by the data service, Mixer. Yahoo explained that Mixer is a “complex, and finally tuned caching scheme that sits on personalization algorithms, to automatically sort and refine the large data sets that flow across the Yahoo and Facebook platforms.” You of course have control in the built-in privacy settings for how you want to share content.
Source: Search Engine Journal