Technology, communication, and the spread of information that goes with have all improved dramatically over the years. At first, long distance communication was very limited, specially through written messages. Then things like the telegram and Morse Code. Then came radio and television. Currently penultimately came the internet and e-mail.
Finally, we have a Social Network, a site where people can interact with each other immediately through a phone or computer. This can result in clubs, sharing of photos and artwork, or new good/bad relationships that would've never been made otherwise.
Generally a Bland-Name Product of Facebook or possibly MySpace if the creator is trying to go off the beaten path a bit. Sometimes it's limited, such as a network only for the faculty and students of a particular school. This permits the storytellers more freedom when, for instance, a suspect pool can be only a few hundred users rather than a few million, or when the protagonist find himself the guy in charge of the whole thing.
Compare The Alternet.
- Referenced in a commercial for Esurance insurance with an out of touch senior telling the camera that she posted all her vacation photos to her "wall" — Description Cut to the senior showing off the photos she pasted to her living room wall.
Woman 2: That's not how it works. That's not how any of this works.
- Valvrave the Liberator has WIRED, an interstellar website created by the Hikikomori Akira Renbokoji. It works like a futuristic version of Facebook and the main communication hub for the Sakamori Academy. Once the war begins with Dorssia and our heroes, it becomes the world's link to everything that's going on. Exploited since Akira has control, specifically when New JIOR loses its PR to the Magius, where the students used the same method and flipped the tables back at them.
- The eponymous CROWDS in Gatchaman Crowds is a social network with built-in GPS tracking which allows its members to do things from rapid exchange of information to crowdsourcing various tasks that are typically done by the governmental services, such as disaster relief and emergency medical help.
- Dragon Ball Z Abridged: Most everything on Earth is available as SpaceX elsewhere, with Space Hulu and Spacebook. The only one that's not a Bland-Name Product? MySpace, of course.
- Magebook, a medieval fantasy version of Facebook for sorcerers that is accessible through the Mirror Net (the medieval fantasy version of the Internet using Magic Mirrors), in Empath: The Luckiest Smurf.
- Peter and Valentine Wiggin of Ender's Game participate in debates over a blogging platform which are apparently prominent enough to influence world politics as a whole.
- The Furry Fandom novel Windfall has Howl, an app designed for canines where they can post anonymous messages to everyone in the area. Presumably as an alternative to actual howling.
- The Blacklist has On Screen, a social media platform that's an Expy of Facebook by Miles McGrath during his time in Princeton before he went underground and became a criminal.
- MI High:
- An episode has a student at St Hope's mention that they'd like to add one of the athletes visiting the school as a friend on "Stutter" (a Bland-Name Product of Twitter), only to learn from another student that Social Networking Sites are banned in that country.
- Another episode has the spies take a look at a "Twitcher" (a parody of Twitter) account of a scientist and see what his last message was before he got kidnapped.
- Mad TV: One of their many Sesame Street parody skits has Bobby meet a new friend on MyPlace, "An internet website where you can make new friends." Bobby's new friend goes by the handle DrFuzzyBalls1969 — he's into fashion (always asking Bobby what he's wearing), and knows a lot about computers (he can type with one hand) — of whom Gordon is suspicious about. It turns out DrFuzzyBalls1969 is Bert who has become an internet predator.
- The Middleman had Myfaceinatube.com, a mashup of Myspace, Facebook, and Youtube.
- Victorious had The Slap, which was equal parts twitter and Facebook in universe, and out of universe was a De Fictionalized Character Blog.
- Lampshaded in one episode of Castle when the title character wakes up to find out Alexis has been helping his mom/her grandmother set up a "MyFace" page. Castle starts to say something to the effect of "That's not the name of the site," and Alexis says she's been trying to explain that all morning.
- The IT Crowd has Friendface and Chitter.
- Ransom has Hypersip, portraying a similar fuction to Reddit with Jab Jab as a similar counterpart to Twitter.
- In Eclipse Phase, the entire economy of the Autonomist faction is based on social networks and the "reputation" scores they assign to members. Over half a dozen networks are listed and it's stated that there are many more, @-net for Anarchists, G-net for criminals, I-net for the Benevolent Conspiracy most players characters are part of...
- Red Markets has LifeLines, a Linkedin-esque whose corporate headquarters were nuked in the Crash but who stored their data on Ubiqs fortified campus allowing one of the surviving employees to hack their website and turn it into a means of organizing Enclaves and eventually setting professional scavengers or Takers up with clients.
- Grand Theft Auto V has LifeInvader, a parody of Facebook, which invites subscribers to 'stalk' each other's posts in the same manner as Facebook's 'Likes' system, as well as "Bleeter", an obvious parody of Twitter.
- Mortal Kombat: As part of Cassie Cage's Selfie Fatality, she will dislodge the opponent's jaw and throat, take a picture, and then upload it to social network called "Friendships" in which several characters and some real-life individuals (Ed Boon as "noobde" and Dan Forden as D4n 4den) will comment on her selfie pic.
- Deep Space 69 has "Spacebook" play a major role in one episode.
- Darths & Droids #1165: "Forceful Takeover" has Darth Vader shut off his shuttle's computer while one of the clone troopers is browsing CloneBook.
Annotation: CloneBook is a great social network for clones. You're automatically friends with everyone else.
- Unwinder's Tall Comics features one comic from an alternate future where Realtree Energy (a failed Facebook clone by a hunting supply company in Real Life) is the most popular social network in the world.
- The Amazing World of Gumball features Elmore Stream (YouTube) and Elmore Plus (named after Google Plus, but more similar to Facebook and Twitter). Earlier episodes have brief appearances of a site called "Fessebook" ("fesse" being French for "buttock").
- In Planes, a replica of YouTube named FlewTube appears as a Freeze-Frame Bonus when Dusty becomes popular after his first victory during the race.
- The Simpsons episode "The D'oh-cial Network" has Lisa creating a friending network called Springface.
- We Bare Bears has several, most of them introduced by Internet addict Panda. The most prominent are "Yo Date!", a Tinder expy on which Panda struggles to find any match, and "Everyone's Tube", where the bears want to become famous like Nom Nom the cute Koala.
- On the revived series of Danger Mouse, the stand-in for YouTube and Facebook is a social networking site called SpamChops.
- On both 6teen and Stōked, a social networking website called "MyFace" (a portmanteau parody of Myspace and Facebook) is mentioned in some episodes of both shows—Caitlin Cooke from 6teen and George Ridgemount from Stoked are mentioned to have their own profiles on the website.
- The YouTube equivalent in Steven Universe is called "TubeTube". In "Too Short to Ride", Peridot uses an unnamed Twitter equivalent that has "Cheeps" instead of "Tweets", and each post corresponds to one made in a real Twitter account as the episode aired.
- The characters on Kaeloo often use the website "Fakebook", which is an obvious parody of Facebook. In the original French dub, it's called "Face de Bouc" ("Goat Face").