Okay, so Jadran is a type of cigarette. When grown-ups smoke, they light a cigarette and smoke in. A cigarette is like a little stick made of paper and it has tobacco inside. Tobacco is a plant that can make you feel relaxed or buzzed when you smoke it because it has a drug called nicotine. However, smoking is not good for your health and it can make you sick. So, it's better to avoid it and breathe fresh air instead.