If you want people to listen to you, you have to know what pleases their ears. It’s not that a voice needs to be attractive to market something useful. It just has to be that a voice has a strong characteristic that makes it unforgettable but understandable at the same time.
By improving your speaking, you also improve the chances of making a sale, especially if you’re peddling your products and services.
These tips from speech science should help everything improve in your speech and speaking.