FILE PHOTO: Facebook CEO Mark Zuckerberg testifies before a House Energy and Commerce Committee hearing regarding the company’s use and protection of user data on Capitol Hill in Washington, U.S., April 11, 2018. REUTERS/Leah Millis/File Photo
Facebook CEO Mark Zuckerberg wants to unify his messaging platforms by 2020. Reuters

The WhatsApp, Instagram and Messenger merger: What's really in it for Facebook?