Plain tobacco packaging is a law that makes tobacco companies sell their products in plain and boring packaging. This means that the cigarette boxes can't have any nice pictures or pretty colors on them. Instead, they're just plain and simple-looking, usually with the brand name in plain letters.
The idea behind this law is to make cigarettes less appealing to people, especially younger people who might be attracted by the colorful and fancy packaging. By making the packaging less exciting, the hope is that fewer people will start smoking, or at least that people won't be influenced to smoke just because of the packaging.
The plain packaging law also means that packs must include graphic health warnings that show pictures of the damage smoking can do to your body (like diseased lungs, for example). This is supposed to make people think twice about smoking and remind them of the serious health risks associated with it.
Overall, the goal of plain tobacco packaging is to discourage people from smoking, to help them quit if they already smoke, and to make sure that everyone is aware of the health risks associated with smoking.