The Voice is a singing show aired on TV in several countries such as France, the UK or the USA. The goal is to have singers contesting to be picked by a jury composed of professional musicians in order to be prepared and trained by them to compete against other singers as to win for having the best voice.
This show is a good opportunity for singers to be known, even if they don't win, and it's also a good way for professionals to be on TV for advertising.