At school, social media can be a brutal barometer of popularity. “If you meet someone new and they ask for your Instagram and you only have 80 followers,” says Sharp, “they’re going to think: ‘You’re not that popular’, but if you have 2,000 followers they’re going to be like: ‘You’re the most popular person in school.’” Sharp quit social media at 13. “I’d rather not know what other people think of me.”
Social media may have been influenced by the 1840s introduction of the telegraph in the US, which connected the country. ARPANET, which first came online in 1967, had by the late 1970s developed a rich cultural exchange of non-government/business ideas and communication, as clearly evidenced by ARPANET#Rules and etiquette's "A 1982 handbook on computing at MIT's AI Lab stated regarding network etiquette," and fully met the current definition of the term "social media" found in this article. The PLATO system launched in 1960, which was developed at the University of Illinois and subsequently commercially marketed by Control Data Corporation, offered early forms of social media with 1973-era innovations such as Notes, PLATO's message-forum application; TERM-talk, its instant-messaging feature; Talkomatic, perhaps the first online chat room; News Report, a crowd-sourced online newspaper and blog; and Access Lists, enabling the owner of a notesfile or other application to limit access to a certain set of users, for example, only friends, classmates, or co-workers. Tom Truscott and Jim Ellis conceived the idea of Usenet in 1979 at the University of North Carolina at Chapel Hill and Duke University, and it was established in 1980.
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 becomes effective through a process called "building social authority". One of the foundation concepts in social media has become that you cannot completely control your message through social media but rather you can simply begin to participate in the "conversation" expecting that you can achieve a significant influence in that conversation.
If you have a product or service of your own that you’d like to promote, you can use social media to generate sales. First, you can share links to your product and a description on your social platforms. One of my friends on Facebook started her own rustic D.I.Y. furniture and home decor business and always posts images of all the products she creates on her page which helps promote her business and bring in new customers.
Use analytics - It’s important to pause every now and then and take stock of what has done well on your social media accounts and what hasn’t. Sites like Fanpage Karma and Squarelovin (Instagram only), will provide data on which of your posts have been most popular. You can use this to identify what content tends to work best, and the best time to post it.
On the other hand, the integration of social media in the business world can also pose challenges. Social media policies are designed to set expectations for appropriate behavior and ensure that an employee's posts will not expose the company to legal problems or public embarrassment. Such policies include directives for when an employee should identify himself as a representative of the company on a social networking website, as well as rules for what types of information can be shared.
Though research has shown evidence that social media plays a role in increasing political polarization, it has also shown evidence that social media use leads to a persuasion of political beliefs.  An online survey consisting of 1,024 U.S. participants was conducted by Diehl, Weeks, and Gil de Zuñiga, which found that individuals who use social media were more likely to have their political beliefs persuaded than those who did not.  In particular, those using social media as a means to receive their news were the most likely to have their political beliefs changed.  Diehl et al. found that the persuasion reported by participants was influenced by the exposure to diverse viewpoints they experienced, both in the content they saw as well as the political discussions they participated in.  Similarly, a study by Hardy and colleagues conducted with 189 students from a Midwestern state university examined the persuasive effect of watching a political comedy video on Facebook.  Hardy et. al found that after watching a Facebook video of the comedian/political commentator John Oliver performing a segment on his show, participants were likely to be persuaded to change their viewpoint on the topic they watched (either payday lending or the Ferguson protests) to one that was closer to the opinion expressed by Oliver.  Furthermore, the persuasion experienced by the participants was found to be reduced if they viewed comments by Facebook users which contradicted the arguments made by Oliver. 
Influencers make money by co-creating content and receiving a commission on all sales, or a flat fee for the partnership (like an ambassador program), depending on the agreement. A commission-based model works well for influencers because it allows them to potentially maximize their income if the product is successful, and they don’t have to outlay any costs upfront!
If you find you enjoy doing the yard sale thing on Facebook, you can do a brisk business in picking things up for resale. You can search through local yard sales, rummages sales, thrift stores, and similar places for valuable items you can flip for a profit online. You can also engage in retail arbitrage, finding items at retail outlets for incredibly low prices and selling them for a profit on Facebook. Leverage your timeline, Facebook groups, and Marketplace as above.
There is speculation that social media is becoming perceived as a trustworthy source of information by a large number of people. The continuous interpersonal connectivity on social media has led to people regarding peer recommendations as a reliable source of information. However, this trust can be exploited by marketers, who can utilise consumer-created content about brands and products to influence public perceptions.
Usenet, which arrived in 1979, was beat by a precursor of the electronic bulletin board system (BBS) known as Community Memory in 1973. True electronic bulletin board systems arrived with the Computer Bulletin Board System in Chicago, which first came online on 16 February 1978. Before long, most major cities had more than one BBS running on TRS-80, Apple II, Atari, IBM PC, Commodore 64, Sinclair, and similar personal computers. The IBM PC was introduced in 1981, and subsequent models of both Mac computers and PCs were used throughout the 1980s. Multiple modems, followed by specialized telecommunication hardware, allowed many users to be online simultaneously. Compuserve, Prodigy and AOL were three of the largest BBS companies and were the first to migrate to the Internet in the 1990s. Between the mid-1980s and the mid-1990s, BBSes numbered in the tens of thousands in North America alone. Message forums (a specific structure of social media) arose with the BBS phenomenon throughout the 1980s and early 1990s. When the Internet proliferated in the mid-1990s, message forums migrated online, becoming Internet forums, primarily due to cheaper per-person access as well as the ability to handle far more people simultaneously than telco modem banks.