Users often don’t invest enough time into their messages, resulting in incomplete, unprofessional, or otherwise under-whelming greetings. Sure, crafting a greeting doesn’t sound all that complicated; however, there are a number of pitfalls users can fall into—i.e. informality, terseness, sincerity, lack of direction, and more. While none of these sound too catastrophic, they are often interrelated. As such, they tend to worsen any problem. For example, humor can cause informality, worsen ambiguity, and weaken sincerity. That being said, users should strive to avoid ALL these pitfalls.
Doing this helps you understand what the prospects are looking for and what they are expecting from you which will in turn help you to cater to them better.

A professional voicemail greeting is a recorded message that welcomes callers to your business when no one is available to pick up the call. For a polished call experience, the greeting should reflect who the client is calling – whether a general business number, department, team, or individual – and when the customer can expect the call to be returned.
Hello, you have reached the law offices of X. Unfortunately, I am attending to another client right now, but I will return your call as soon as I can. Please leave me your name, reason for calling, and your number so I can connect you with the right department. This is far more professional than the other examples given in this guide. Lawyers should always be formal, smooth, and confident. Nobody is calling to make friends. They’re calling to get the job done. That’s why your message should be all business.