A general voicemail greeting is what callers will be greeted with if you are unable to answer the phone at work. It is the everyday greeting, used as the default, unless you have set up a temporary greeting, such as an away message while you're on vacation, or a special message during a holiday.
You can easily index, store or forward your voicemail for further action. Just like your email.

Texting takes seconds. And in a text conversation, the entire dialogue can happen asynchronously. You don’t need both parties to be on their phones at the same time, and most people don’t expect an immediate response to a text message.
On hold messages can be recorded for many purposes, such as promoting your business, answering FAQs or announcing important customer service information. It's important to be clear in the message you are trying to get across. Confusion leads to disengagement and reflects badly on the brand. Determining your callers' wait times is necessary to determine the required length of the on-hold message. Making the recording too short can lead to the message being played too many times. This can be repetitive and lose the caller's attention while they hold.