Have you ever judged a company based on how poor their phone messages were? We have. Avoid giving your existing or potential customers negative arguments about the quality of your service or brand image.
2. YOU HAVE A CAPTIVE AUDIENCE. The time that your callers spend on hold is time when they are a captive audience. Providing messaging when callers are on hold helps occupy and entertain them to some degree; and most importantly, your business can make the most of that captive customer time.

It's a panoptic experience, being on hold while listening to someone singing about being on hold. Depending how long it takes for someone else to join the call, you could be listening for awhile. The music builds as time goes on, culminating in a spoken verse that begins: "Well, let me tell you all a story / about a man who was on hold all day..." This unusually self-aware song is the default music for a conference call service called UberConference, where "I'm On Hold" plays on a loop for anyone who calls in early, on almost every call that doesn't start exactly when it's scheduled to (or doesn't ever start at all). It's selected by nine out of ten call organizers, and plays over a million times per month, says Craig Walker, CEO of Dialpad, owner of UberConference.
The problem, in my mind, is that every single one of these articles misses the point completely. Even if you implemented a call centre system that detected and automatically played someone’s all-time favourite music while they waited, a facility which is possibly not that far off, most music when played down the phone just sounds terrible. Butchering a song that someone actually likes is unlikely to improve the waiting experience.