While email and text support saw an increase in recent years, many customers, partners, and potential hires still prefer to call your company directly. When writing your voicemail script, include basic information such as a short greeting, your company name, an invitation to leave a short message, and the time frame in which the caller can expect a return call. If relevant, you may want to include your office hours, extensions for company departments, and the contact information for your office manager or HR department.
On the other hand, a stellar professional voicemail is more than just a way to ensure callers are heard. It’s actually a gateway to encourage recruiters, clients, connections, venders, and other callers to continue forward with the first step in developing a business relationship, which is them making contact. The power of the right voicemail greeting is the caller actually staying on the line to leave that contact information or gain access to an alternative contact point.

Website: https://shoretelcommunity.force.com/s/article/How-to-Record-and-Change-Your-Voicemail-Greeting
One of the things to remember before recording your business voicemail greetings is to identify your pain points. This will help you to state more clearly for your clients in leaving enough context when leaving a voicemail.