What role do wine certifications play in New Zealand's wine industry?

The wine certifications, e. g., Sustainable Winegrowing New Zealand and Organic Winegrowing New Zealand, not only confirm that the winery keeps the highest quality, but also that it is environmentally responsible and adopts ethical policies. The main function of these certification is to give an open space to the consumer and also for their trade partners through which they can trust and like the New Zealand wine.