With a snus, the nicotine is contained in a tablet or tea bag that is placed under the upper lip. Nicotine enters the blood via blood vessels in the upper lip.
Snus does not release combustion products. It is therefore safer than smoking, but the harmful effect of nicotine remains. However, the absorption of nicotine into the blood is slower through snus than through smoking. That is why snus is slightly less addictive than regular smoking tobacco.
Snus (with tobacco) is prohibited in the Netherlands. Novus Fumus sells snus varieties without tobacco. These are bags with powder to which nicotine has been added (nicotine bags or nicotine pouches), so they contain no tobacco and are therefore not (yet) prohibited.