Google+ isn’t so different from Facebook and Twitter in that it allows you to get a message out to a lot of people. The one nice thing about it, though, is that you can separate people into different “circles,” so you can really then target different people of different demographics with your messages and test which marketing messages worked best with who. It’s a great tool to use to really test the potential success of a social media marketing scheme.
First of all, thanks for sharing this list. It’s really useful, but it would be great to supplement it with some kind of statistics regarding the audience who is using each of these social networks. This statistics could be valuable for different kind of marketers, bloggers or business owners because with such statistics it would be possible to plan a strategy for business in different niches, like e-commerce, paper help online, any kind of services, or use it for the purpose of self-promotions for bloggers/website owners.
Social Media Usage is at the all time high right now in World and still growing. India just became the number one country for Facebook in the world in terms of monthly active users! You can see from this slide from 2017 Digital Yearbook by ‘We Are Social’ that the active social media users worldwide are already about to touch 3 billion users! Just imagine how big the market is out there. All you need to do is to effectively tap this market.
Some online behaviors can cause stress and anxiety, due to the permanence of online posts, the fear of being hacked, or of universities and employers exploring social media pages. Turkle also speculates that people are beginning to prefer texting to face-to-face communication, which can contribute to feelings of loneliness. Some researchers have also found that exchanges that involved direct communication and reciprocation of messages correlated with less feelings of loneliness. However, passively using social media without sending or receiving messages does not make people feel less lonely unless they were lonely to begin with.
Some of the teens I spoke to were concerned about how technologies such as Snap Map – a Snapchat feature that tracks your friends geographically, in real time – were spreading through their schools, and mistrustful of the privacy consequences of being surveilled by your followers wherever you go. “Snap Map is this big thing with a lot of my friends, but there is a sense of privacy that is being breached as well,” Isabelle says.
Social CRM (customer relationship marketing) can be a very powerful business tool. For example, establishing a Facebook page allows people who like your brand and the way you conduct business to Like your page, which creates a venue for communication, marketing and networking. Through social media sites, you can follow conversations about your brand for real-time market data and feedback.
Courts do not always admit social media evidence, in part because screenshots can be faked or tampered with. Judges are taking emojis into account to assess statements made on social media; in one Michigan case where a person alleged that another person had defamed them in an online comment, the judge disagreed, noting that there was an emoji after the comment which indicated that it was a joke. In a 2014 case in Ontario against a police officer regarding alleged assault of a protester during the G20 summit, the court rejected the Crown's application to use a digital photo of the protest that was anonymously posted online, because there was no metadata proving when the photo was taken and it could have been digitally altered.
Recent research has demonstrated that social media, and media in general, have the power to increase the scope of stereotypes not only in children but people all ages. Three researchers at Blanquerna University, Spain, examined how adolescents interact with social media and specifically Facebook. They suggest that interactions on the website encourage representing oneself in the traditional gender constructs, which helps maintain gender stereotypes. The authors noted that girls generally show more emotion in their posts and more frequently change their profile pictures, which according to some psychologists can lead to self-objectification. On the other hand, the researchers found that boys prefer to portray themselves as strong, independent, and powerful. For example, men often post pictures of objects and not themselves, and rarely change their profile pictures; using the pages more for entertainment and pragmatic reasons. In contrast girls generally post more images that include themselves, friends and things they have emotional ties to, which the researchers attributed that to the higher emotional intelligence of girls at a younger age. The authors sampled over 632 girls and boys from the ages of 12–16 from Spain in an effort to confirm their beliefs. The researchers concluded that masculinity is more commonly associated with a positive psychological well-being, while femininity displays less psychological well-being. Furthermore, the researchers discovered that people tend not to completely conform to either stereotype, and encompass desirable parts of both. Users of Facebook generally use their profile to reflect that they are a "normal" person. Social media was found to uphold gender stereotypes both feminine and masculine. The researchers also noted that the traditional stereotypes are often upheld by boys more so than girls. The authors described how neither stereotype was entirely positive, but most people viewed masculine values as more positive.
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." 
According to the Pew Research Center, a majority of Americans at least occasionally receive news from social media.  Because of algorithms on social media which filter and display news content which are likely to match their users’ political preferences, a potential impact of receiving news from social media includes an increase in political polarization due to selective exposure.  Political polarization refers to when an individual's stance on a topic is more likely to be strictly defined by their identification with a specific political party or ideology than on other factors. Selective exposure occurs when an individual favors information which supports their beliefs and avoids information which conflicts with their beliefs. A study by Hayat and Samuel-Azran conducted during the 2016 U.S. presidential election observed an “echo chamber” effect of selective exposure among 27,811 Twitter users following the content of cable news shows.  The Twitter users observed in the study were found to have little interaction with users and content whose beliefs were different from their own, possibly heightening polarization effects. 
Another trend that influences the way youth communicates is the though the use of hashtags. With the introduction of social media platforms such as Twitter, Facebook and Instagram, the hashtag was created to easily organize and search for information. Hashtags can be used when people want to advocate for a movement, store content or tweets from a movement for future use, and allow other social media users to contribute to a discussion about a certain movement by using existing hashtags. Using hashtags as a way to advocate for something online makes it easier and more accessible for more people to acknowledge it around the world.As hashtags such as #tbt ("throwback Thursday") become a part of online communication, it influenced the way in which youth share and communicate in their daily lives. Because of these changes in linguistics and communication etiquette, researchers of media semiotics[who?] have found that this has altered youth's communications habits and more.[vague]