The most engaging messages are slightly unique in nature. They combine a mix of clever scripting and music. Slight humour is often used to promote a product or service and is usually quite effective. It's also very important to choose both the written and spoken tone that appeals to the characteristics of your audience. If your target market is the younger generation, a script that includes slang words and is quite laid back would be an excellent choice. If your target market is primarily business professionals, then a more articulate choice of words would be more suitable.
Avoid using ‘please’ more than once, it gets wordy and redundant. The goal is to keep the content as concise as possible, moving callers quickly and seamlessly through the options.

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.
Website: https://www.onhold.com/blog/are-you-looking-for-an-incredible-phone-experience-for-your-business