After creating, the Voicemail Greeting, you can test it by calling to your number from another phone, and see if it is playing correctly or not. Open the Phone App. On the lower screen, tap on the Voicemail option. Select Custom, with this option, you can record the personal voicemail greeting on the iPhone. Tap Record, to start recording the voicemail greeting message on the iPhone. Greeting samples are given in this article below, Once you are done with recording, tap Play to listen. Lastly, if everything is alright, and custom voicemail recording is perfect, then tap Save.
Say that your prospects want to speak to the sales department and so when they realize that they have reached the right department and hear the voicemail messages, they will be compelled to leave their contact details so that the sales team can reach out to them later. They will be relieved.

This is an opportunity to create a memorable impression with something that would differentiate you from everyone else. Most people are professional (think, boring) in their greetings. Why not do something fun instead? The goal is to get the caller to leave a voicemail, but also to reflect your brand identity and stand out from the crowd.
Tip: If you are a larger business and this is a voicemail that pertains to the general business number, then you want to sound professional and provide as much information as you think is necessary for a potential client. Usually, the company website URL or the company email is a good way to get the customer to contact you through other means.