School bells have been used for generations to mark the start and end of lessons, and recordings of their sharp ringing have become a staple sound effect for creators online. The clip is widely shared on soundboards and in short-form video, where it instantly sets a classroom scene without any visuals. It is often used alongside a simple ding sound effect for transitions, countdowns and comedic timing. Its popularity endures because the sound is universally recognised, evokes school memories and works in skits, memes, edits and educational videos.