'M' is Facebook's Personal Assistant Inside Messenger

Just after Microsoft released Cortana on open beta, Facebook has released M, their personal assistant that works through their Messenger app. M takes being a personal assistant up a step by being available across platforms and being able to make purchases, send gifts, book restaurants, etc. Facebook is turning Messenger into an app that connects businesses to customers in a more in-depth manner as well as a platform for people to incorporate their own apps and programs into it directly through Messenger.