The click comes from the stock keyboard sound design built into Apple's iPhone and iOS, where short taps confirm key presses and a distinct backspace action removes characters. As screen recordings and fake chat videos became common on social media, creators lifted and reused the isolated typing and deleting sounds outside the phone itself. The delete click in particular became shorthand for second thoughts in texting culture, appearing in meme edits, storytimes and parody conversations where the joke depends on watching a message get written, reconsidered and wiped away again.