If they don’t leave a message, you’ll never know who called. Some people may assume they should just call back later. But if you prefer to get back to them at your leisure, encourage them to leave a message.
If you don’t know it by now, you might never know. Voicemail greetings are incredibly important to users. It conveys identity, character, and image to callers. In an increasingly digital world, where business is conducted online and over the phone, phone presence is increasingly important. As such, your greeting is a crucial part of the platform. While there are a number of obstacles to be aware of, utilized properly, voicemail greetings can be incredibly helpful and beneficial; therefore, its in users best interest to invest themselves in creating a quality recording.

“Hello, you’ve reached the Marketing Department at [XYZ Company]. All of our team members are currently working with other clients to [insert goal] and are unable to take your call.
If the you haven't changed your personal greeting, a default system greeting will be played for callers. For example, "Please leave a message for John Smith. After the tone, please record your message. When you finish recording hang-up or press the pound key for more options."