Cal Newport

Consider that the ability to concentrate without distraction on hard tasks is becoming increasingly valuable in an increasingly complicated economy. Social media weakens this skill because it’s engineered to be addictive. The more you use social media in the way it’s designed to be used — persistently throughout your waking hours — the more your brain learns to crave a quick hit of stimulus at the slightest hint of boredom. 

Once this Pavlovian connection is solidified, it becomes hard to give difficult tasks the unbroken concentration they require, and your brain simply won’t tolerate such a long period without a fix. Indeed, part of my own rejection of social media comes from this fear that these services will diminish my ability to concentrate — the skill on which I make my living.

. . . . .A dedication to cultivating your social media brand is a fundamentally passive approach to professional advancement. It diverts your time and attention away from producing work that matters and toward convincing the world that you matter. The latter activity is seductive, especially for many members of my generation who were raised on this message, but it can be disastrously counterproductive.

~From Quit Social Media. Your Career May Depend on It. New York Times, November 19, 2016