This Week in Social is a weekly digest of some of the biggest stories in social media marketing news. These stories are the show notes for the Brave Ad World Podcast. Each story is discussed at a deeper level on the podcast.

This week’s headlines: Facebook Updates Newsfeed Algorithm in Effort to Deliver More Relevant Ads to Users, Facebook Brings Status Updates to Graph Search, Facebook Introduces New Mobile Ad Unit, Snapchat Launches Snapchat Stories and Twitter Files for IPO with SEC.

The week’s news quick hits: Twitter Makes Photos Bigger, Social Media Spam Increases in 2013 and Ads Confirmed for Instagram.