Using concise and simple words in your scripting helps ensure callers can comprehend what is being said. Although a complete on-hold message can be quite lengthy, it should include concise and to the point single messages. Aim to get each message across in around 35 to 40 words. Remember, what may read great in written word doesn't necessary sound great said out aloud.
Not many might consider it, but your business voicemail greeting is probably more important than you think. Now, we probably all hate recording those generic voicemail greetings at home or on our cell phones. But when it comes to our business – a generic, lifeless robotic greeting probably just won’t cut it. And thanks to the software that comes with your business VoIP solution, it is easier than ever to change your greetings on the fly.

In the side panel, under After Hours Auto Attendant click Menu. Edit a Greeting for After Hours Auto Attendant
Only one out of every five customers will listen to your voicemail if they don’t recognize your number. With listen rates that low, your response rates are going to be abysmal. If you have a front desk receptionist or another employee making outbound calls, you’re going to have a hard time making that worth your while.