With major social media upheaval in the last quarter alone, now is a great time to gauge your particular engagement strategy with all of the major players. You have potential access to the almost five billion people, worldwide, who have social media accounts – 55% of the world’s population – who spend an average of 70 hours every month on their social media apps. While some of the big basics – like who are the primary moneymakers in the game – aren’t bound to change any time soon, some big shake-ups remind us that technology shifts can often happen suddenly – one reason a PR team could help you navigate these changes. Here are some helpful year-end stats for the usage and revenue of the major social media outlets.