The clicker itself is a long-established dog-training tool, used to mark a desired behaviour at the exact moment it happens, which made its crisp sound familiar to pet owners long before it became a meme. As short pet videos grew on social platforms, creators began lifting that familiar click to punctuate tricks, reactions and training wins, because viewers instantly recognise it as praise. It remains popular because it is instantly readable, family-friendly and easy to drop into almost any cute animal edit.