Privacy rights advocates warn users on social media about the collection of their personal data. Some information is captured without the user's knowledge or consent through electronic tracking and third party applications. Data may also be collected for law enforcement and governmental purposes,[176] by social media intelligence using data mining techniques.[180] Data and information may also be collected for third party use. When information is shared on social media, that information is no longer private. There have been many cases in which young persons especially, share personal information, which can attract predators. It is very important to monitor what you share, and to be aware of who you could potentially be sharing that information with. Teens especially share significantly more information on the internet now than they have in the past. Teens are much more likely to share their personal information, such as email address, phone number, and school names.[182] Studies suggest that teens are not aware of what they are posting and how much of that information can be accessed by third parties.

Excessive use of digital technology, like social media, by adolescents can cause disruptions in their physical and mental health, in sleeping patterns, their weight and levels of exercise and notably in their academic performance. Research has continued to demonstrate that long hours spent on mobile devices have shown a positive relationship with an increase in teenagers' BMI and a lack of physical activity. Moreover, excessive internet usage has been linked to lower grades compared to users who don't spend an excessive amount of time online, even with a control over age, gender, race, parent education and personal contentment factors that may affect the study.[147] In a recent study, it was found that time spent on Facebook has a strong negative relationship with overall GPA.[148] The use of multiple social media platforms is more strongly associated with depression and anxiety among young adults than time spent online. The analysis showed that people who reported using the most platforms (7 to 11) had more than three times the risk of depression and anxiety than people who used the fewest (0 to 2).[149] Social media addiction and its sub-dimensions have a high positive correlation. The more the participants are addicted to social media, the less satisfied they are with life.[150]


In addition to monetizing their influence and social networks, influencers can monetize their personal skills, whether it be photography, copywriting, creative direction, strategic consulting, styling or content creation. Influencers are typically business-savvy creatives who have used their skills to create a personal brand that ultimately drives revenue. So, brands often work with influencers by hiring them as freelancers. After all, influencers are professional content creators. 

Social media personalities have been employed by marketers to promote products online. Research shows that digital endorsements seem to be successfully targeting social media users,[84] especially younger consumers who have grown up in the digital age.[85] Celebrities with large social media followings, such as Kylie Jenner, regularly endorse products to their followers on their social media pages.[86] In 2013, the United Kingdom Advertising Standards Authority (ASA) began to advise celebrities and sports stars to make it clear if they had been paid to tweet about a product or service by using the hashtag #spon or #ad within tweets containing endorsements.

UK researchers used a dataset of more than 800 million Twitter messages to evaluate how collective mood changes over the course of 24 hours and across the seasons. The research team collected 800 million anonymous Tweets from 33,576 time points over four years, to examine anger and sadness and compare them with fatigue. The "research revealed strong circadian patterns for both positive and negative moods. The profiles of anger and fatigue were found remarkably stable across the seasons or between the weekdays/weekend." The "positive emotions and sadness showed more variability in response to these changing conditions and higher levels of interaction with the onset of sunlight exposure." [155]

Social media is being used in a range of court cases including employment law, child custody/child support and insurance disability claims. After an Apple employee criticized his employer on Facebook, he was fired. When the former employee sued Apple for unfair dismissal, the court, after seeing the man's Facebook posts, found in favour of Apple, as the man's social media comments breached Apple's policies.[75] After a heterosexual couple broke up, the man posted "violent rap lyrics from a song that talked about fantasies of killing the rapper’s ex-wife" and made threats against him. The court found him guilty and he was sentenced to jail.[76] In a disability claims case, a woman who fell at work claimed that she was permanently injured; the employer used her social media posts of her travels and activities to counter her claims.[77]
According to a study released in 2017 by researchers from the University of Pittsburgh, the link between sleep disturbance and the use of social media was clear. It concluded that blue light had a part to play—and how often they logged on, rather than time spent on social media sites, was a higher predictor of disturbed sleep, suggesting "an obsessive 'checking'".[151] The strong relationship of social media use and sleep disturbance has significant clinical ramifications for a young adults health and well-being. In a recent study, wehave learned that people in the highest quartile for social media use per week report the most amount of sleep disturbance. The median number of minutes of social media use per day is 61 minutes. Lastly, wehave learned that females are more inclined to experience high levels of sleep disturbance than males. [152]
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Quitting social media is a determined move: apps including Facebook and Instagram are designed to be addictive. “Social media is so ingrained in teenage culture that it’s hard to take it out. But when you do, it’s such a relief,” Amanuel says. She has received a lot of “admiration” from her peers for quitting. “They wish they were able to log off. People feel like social media is a part of them and their identities as teenagers and something you need to do,” she says. “But I’m no less of a teenager because I don’t use it.”

If you have a blog or website, you can promote it. And if you do affiliate marketing, you can promote that on Facebook too. If you are able to write your blog posts or descriptions to your affiliate marketing landing pages in such a way that you inspire the reader to go and visit your site, then you’ve well on your way to making good money. Remember to always write about what’s in it for the reader (i.e. 20% off such-and-such a product or “Want to know how to get a FREE IPAD2?”).
Are you a popular vlogger? Do you post a lot of funny animal videos that go viral? You might be able to make some income by joining the YouTube Partner Program, in which you allow Google to place ads at the beginning of your videos. You then share in that ad revenue. Grace Helbig is a prominent example of someone who’s made a living off of creating fun YouTube videos and promoting herself on other social media outlets. Admittedly, your chances of becoming a YouTube star and getting rich off it are low, but if you’ve got an engaging personality, sense of humor or a unique perspective than the YouTube Partner Program may be an avenue worth exploring.
Checking updates on friends' activities on social media is associated with the "fear of missing out" (FOMO), the "pervasive apprehension that others might be having rewarding experiences from which one is absent".[100] FOMO is a social anxiety[101] characterized by "a desire to stay continually connected with what others are doing".[102] It has negative influences on people's psychological health and well-being because it could contribute to negative mood and depressed feelings.[103]
Some social media sites have potential for content posted there to spread virally over social networks. The term is an analogy to the concept of viral infections, which can spread rapidly from person to person. In a social media context, content or websites that are "viral" (or which "go viral") are those with a greater likelihood that users will reshare content posted (by another user) to their social network, leading to further sharing. In some cases, posts containing popular content or fast-breaking news have been rapidly shared and reshared by a huge number of users. Many social media sites provide a specific functionality to help users reshare content, such as Twitter's retweet button, Pinterest's pin function, Facebook's share option or Tumblr's reblog function. Businesses have a particular interest in viral marketing tactics because a viral campaign can achieve widespread advertising coverage (particularly if the viral reposting itself makes the news) for a fraction of the cost of a traditional marketing campaign, which typically uses printed materials, like newspapers, magazines, mailings, and billboards, and television and radio commercials. Nonprofit organizations and activists may have similar interests in posting content on social media sites with the aim of it going viral. A popular component and feature of Twitter is retweeting. Twitter allows other people to keep up with important events, stay connected with their peers, and can contribute in various ways throughout social media.[25] When certain posts become popular, they start to get retweeted over and over again, becoming viral. Hashtags can be used in tweets, and can also be used to take count of how many people have used that hashtag.
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