Social Pro Daily What Are Facebook Users Who Are Testing M Asking For? The few users with access to Facebook’s test of its M personal assistant for Messenger are not even scratching the surface of what it can do. By David Cohen October 21, 2015 The few users with access to Facebook’s test of its M personal assistant for Messenger are not even scratching the surface of what it can do. David Cohen david.cohen@adweek.com David Cohen is editor of Adweek's Social Pro Daily. Recommended articles