Nickelodeon is an American children's television channel that launched in 1979 and became known for its playful animated branding and cartoon programming. Its short intro jingles, played before shows, helped make the channel instantly recognisable to young viewers across the United States and later internationally. As those viewers grew up, clips of the intros began circulating online in nostalgia compilations, reaction videos and memes. The sound endures because it instantly evokes Saturday mornings, after-school cartoons and a very specific era of children's television.