Even in the United States, the birth-country of Twitter, currently in 2015 the social network has 306 million accounts.[174] Because there are likely to be many multi-account users, and the United States in 2012 had a population of 314.7 million,[175] the adoption of Twitter is somewhat limited. Professor Matthew Auer of Bates College casts doubt on the conventional wisdom that social media are open and participatory. He also speculates on the emergence of "anti-social media" used as "instruments of pure control."[176]

Many teenagers suffer from sleep deprivation as they spend long hours at night on their phones, and this, in turn, could affect grades as they will be tired and unfocused in school. Social media has generated a phenomenon known as " Facebook depression", which is a type of depression that affects adolescents who spend too much of their free time engaging with social media sites. "Facebook depression" leads to problems such as reclusiveness which can negatively damage ones health by creating feelings of loneliness and low self-esteem among young people.[153] At the same time, a 2017 shown that there is a link between social media addiction and negative mental health effects. In this study, almost 6,000 adolescent students were examined using the Bergen Social Media Addiction Scale. 4.5% of these students were found to be "at risk" of social media addiction. Furthermore, this same 4.5% reported low self-esteem and high levels of depressive symptoms.[154]

Over the last several years, there has been an explosion of growth in popular social media platforms like Facebook, Twitter, Google+, LinkedIn, YouTube, Pinterest, and many others. It's safe to say that the era of social media is just getting started, and the need for social media in business will only become stronger over time. The whole world has seen the impact of the expansion and adoption of social media tactics, and the rising stats speak for themselves.
Gen Z has an interest in privacy that subtly sets them apart. “Young people want to get away from the curtain-twitching village, where everyone knows everything about you,” Binns says. So while today’s teens spend a lot of time online, they don’t actually share that much personal information. And when they do share, it’s strategic. “You’re painting a picture of who you are and your image,” says Binns. “It’s your own shop window or brand.”
Social media are interactive computer-mediated technologies that facilitate the creation and sharing of information, ideas, career interests and other forms of expression via virtual communities and networks.[1] The variety of stand-alone and built-in social media services currently available introduces challenges of definition; however, there are some common features:[2]