"Nice delivery of the humor! [It] would keep an on-hold caller waiting to hear what comes next." - Ricky Roo / On Hold Messaging Association's MARCE Awards Judge
This is perhaps the most encouraging song in the list. Hold on, your Customer Service Representative is coming. Probably.

It seems pretty self-explanatory: on-hold messages are messages that play “on hold” over your telephone system. These professionally produced recordings are also an integral part of your company’s marketing strategy. By providing timely, relevant information about your business, an on-hold messaging program reinforces current marketing campaigns and builds brand recognition. This in turn increases call retention by improving the caller experience. To top it all off, it also increases sales by targeting key demographics.
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.