Based on the available info, this sound is identified as an airport bell labeled CGN, commonly understood as a short pre-announcement terminal chime. Clips like this spread online because they instantly signal airports, check-in desks and boarding gates without needing any dialogue. Creators keep using them in travel memes, delay jokes and mock public-address edits because the sound is clear, neutral and easy to place at the start of a scene. It also fits well beside simple notification-style effects such as a ding sound effect.