Facebook is an extremely effective channel for reaching new audiences – largely due to the sheer number of users. Here’s the proof: According to Statista, Facebook had 2.32 billion monthly active users as of Q4 2018. For marketers and product managers, Facebook represents one of the world’s largest pools of potential app users primed for acquisition. Even more compelling? The population of Facebook app users shows no sign of slowing down: The app was among the top 5 most downloaded…