The Seinfeld theme is the opening music associated with the American television sitcom Seinfeld, which debuted in 1989. Its bass-driven, quirky style became closely tied to the show's stand-up intros and scenes about minor everyday problems. Online, the sound spread through reaction edits, short skits, and meme videos that frame normal life as if it were a 90s sitcom. It still gets reused because the melody is instantly recognizable and quickly signals awkwardness, irony, and observational humor without needing dialogue.