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: Tumblr Shares its Social TV Value, Facebook Continues Social Ad Momentum in Q1 2014 Earnings, Pinterest Introduces New Search Features, Google+ Leader Steps Down and LinkedIn Adds New Ad Features.

The week’s news quick hits: Instagram Photos Posted to Facebook Now Display Cross-Platform Likes, WhatsApp Reaches 500 Million Active User Mark, Google Launches App Install Ads, +Post Ads Go Live for Public, Reddit Launching Geo-Targeted Ads, Amazon Reports Strong Earnings and Facebook Acquires Fitness Tracking App.