The phrase it's lit became popular online slang for something exciting, energetic or going well, and short repetitions of it spread as a reaction sound across meme edits and soundboards. This version compresses the phrase into a rapid loop lasting less than a second, which makes it easy to drop into fast paced videos without interrupting the flow. It stays popular because the meaning is instantly understood, the rhythm feels like a chant, and it works both sincerely for real celebrations and sarcastically for minor moments treated like major events.