The information you provide in your business answering machine greeting can vary depending on your specific needs, though some basic information is common. You should indicate the business that has been reached, including a specific name if you have a personal business number or extension. If the message is for general use, you might indicate that you are unavailable, though a message for use after business hours can provide the caller with regular business hours. You should not, however, use any language that could be taken to indicate that you are busy with a task that is more important than your caller.
If someone takes the time to call and leave you a voice message, they usually have a reason that they are calling. It does convey a certain level of interest when someone is willing to hop on the phone with you. If they were less interested, they would probably send you an email or fill out a form on your website.

Obviously, I need to update it. And if you haven't changed your voicemail greeting in over a year, you're likely in the same boat.
Voicemails don’t necessarily have to be monotonous or extremely jazzy or funky. What you should be looking for is a balance between the two. Whenever you call someone and their voicemail greeting is playing, it tells you a lot about who they are, as a person. Which is why, you’ve got to put a little bit of “you” when it comes to voicemail. And the best part about all of this is, since you couldn’t come to the phone, at least the callers are having a good time listening to the message.