This is an excellent question, and it has a simple and short answer: I make and edit videos with it, so that I can sell them and earn money. My industry is the freelance world for music and video, thus, if there´s software that allows me to make and edit videos quickly, then this software will be one of the main tools for my business, and this is the reason why Movie Maker is a vital piece for my business that allows me to handle most of my video needs.
The second big draw is communication. The app creates a unified inbox for comments on Facebook and Instagram and messages from Messenger, so that you don’t have to bounce between different apps in order to respond to people. The app doesn’t seem to cover every possible messaging vector inside of Facebook’s services, but it sounds like a handy start. <<