Italian wine classification is primarily based on the quality and origin of the wine. The main categories include DOCG (Denominazione di Origine Controllata e Garantita), which represents the highest quality wines, followed by DOC (Denominazione di Origine Controllata) for controlled origin wines, and IGT (Indicazione Geografica Tipica) for wines with less strict regulations. Each classification ensures that wines meet specific standards regarding grape varieties, production methods, and geographical origin. This system helps consumers identify quality wines and promotes the unique characteristics of different Italian wine regions, such as Tuscany and Piedmont.