A look at the role of social media manager, which has evolved from a position commonly filled by millennial interns into a more professionalized discipline (Krithika Varagur/Wall Street Journal)

Krithika Varagur / Wall Street Journal:
A look at the role of social media manager, which has evolved from a position commonly filled by millennial interns into a more professionalized discipline  —  Some social-media veterans have been at their jobs for 15 years at this point and have unprecedented sway