This week’s headlines: Facebook Launches Revamped News Feed, Facebook Defends Its Newsfeed Algorithm… Again, Twitter and Nielsen Launch Survey Tool, Tumblr Launching Mobile Ads, Google+ Gets Design Overhaul and Path Adds Monetization Features.

The week’s news quick hits cover: Twitter Announces Tweetdeck’s Demise, YouTube May be Planning Music Service, 15 Million Businesses have Facebook Pages, Highlight Updates to Add Photos and Events, Twitter iOS Update Removes Video Services, Twitter Updates Mobile Search and Quora Now Includes Reviews.