Social and cultural phenomena specific to the Internet include Internet memes, such as popular themes, catchphrases, images, viral videos, and jokes. When such fads and sensations occur online, they tend to grow rapidly and become more widespread because the instant communication facilitates word of mouth transmission.
See also: Duolingo, Eunoia, 4chan, Animaniacs (2020 TV series), Renata Sorrah, and Mathematical joke.