ICQ was one of the earliest popular instant messaging services, reaching millions of users in the late 1990s before modern chat apps took over. Its short, instantly recognisable notification sounds became part of early internet culture, and clips labelled as ICQ phone sounds still circulate on soundboards as retro alerts. Creators keep using them because a single old-fashioned ring can instantly set a scene in the past, signal a message without dialogue, and trigger nostalgia for viewers who remember waiting for friends to come online.