Voice coaches are professional mentors and experts in vocal performance who guide and train singers to improve their singing techniques, stage presence, and overall performance. In the context of the TV show "The Voice," coaches are established artists and singers who serve as mentors to contestants, helping them develop their singing abilities and compete in the show. These coaches provide critiques, advice, and competitive support to their team members throughout the competition. For example, in Season 28 of "The Voice," voice coaches include Michael Bublé, Snoop Dogg, Niall Horan, and Reba McEntire, all of whom are well-known musicians with experience in coaching contestants to success on the show. Their role includes discovering new singing talent and preparing them to perform at their best on the show.