Tobacco leaf is the dried leaf of the Nicotiana plant, primarily Nicotiana tabacum. It is cultivated for its nicotine content and is the main ingredient in products like cigarettes, cigars, and chewing tobacco. The leaves are harvested, cured, and processed to enhance flavor and reduce harshness. Tobacco leaves are typically classified into various types based on their growing conditions and processing methods. These include Virginia, Burley, and Oriental tobacco. Each type has distinct characteristics that influence the taste and aroma of tobacco products, making them popular among different consumer preferences.