This week’s headlines: TikTok Surpasses One Billion Downloads

The week’s news quick hits: Pinterest and YouTube Go After Anti-Vaccination Propaganda, Instagram May Soon Enable Public Collections, Foursquare Launches New Offline Attribution Offering, Snapchat Android App Coming in 2019, Time Warner Acquisition Gets Closer to Reality, Facebook’s Clear History Feature Confirmed for 2019, LinkedIn Adds Raise Insight to LinkedIn Jobs, Facebook Woos TV Ad Buyers to Watch with Showcase and YouTube Disables Comments on Videos with Minors.