It’s more important that your callers feel like they can ask you for help on a subject they don’t know too well. A really easy way of simplifying your greetings is by using smaller words. Imagine yourself explaining what you want to a three-year-old. Your customers aren’t stupid, but they’re not going to always be familiar with typical business jargon. Make sure you’re adjusting your greetings to accommodate for the lack of familiarity, unnecessary details, and technical information.
The bottom line is that a business’s situation is likely to change often and rapidly, each of which need a unique and applicable voicemail greeting to cover the circumstances and timeline. For example, callers shouldn’t reach a business-as-usual voicemail, and therefore expect a return call within the business day, if the subject they’re calling is out on vacation for two weeks. Such a lack of communication is a recipe to lose that caller’s trust and tarnish the brand’s reputation.

An answering machine is an electronic device designed to intercept incoming calls from a landline telephone and record messages from the person attempting to contact the phone's owner.
If you’re going to start with a common statement such as ‘Your call is important to us’ and the other statements you have heard, your prospects are going to walk away.